diff --git a/app/app.py b/app/app.py
new file mode 100644
index 0000000..966a414
--- /dev/null
+++ b/app/app.py
@@ -0,0 +1,19 @@
+"""Streamlit entrypoint."""
+from pathlib import Path
+import streamlit as st
+from app.wizard import SnipeSetupWizard
+
+st.set_page_config(
+    page_title="Snipe",
+    page_icon="🎯",
+    layout="wide",
+    initial_sidebar_state="expanded",
+)
+
+wizard = SnipeSetupWizard(env_path=Path(".env"))
+if not wizard.is_configured():
+    wizard.run()
+    st.stop()
+
+from app.ui.Search import render
+render()
diff --git a/app/ui/Search.py b/app/ui/Search.py
new file mode 100644
index 0000000..3af9558
--- /dev/null
+++ b/app/ui/Search.py
@@ -0,0 +1,127 @@
+"""Main search + results page."""
+from __future__ import annotations
+import os
+from pathlib import Path
+import streamlit as st
+from circuitforge_core.config import load_env
+from app.db.store import Store
+from app.platforms import SearchFilters
+from app.platforms.ebay.auth import EbayTokenManager
+from app.platforms.ebay.adapter import EbayAdapter
+from app.trust import TrustScorer
+from app.ui.components.filters import build_filter_options, render_filter_sidebar, FilterState
+from app.ui.components.listing_row import render_listing_row
+
+load_env(Path(".env"))
+_DB_PATH = Path(os.environ.get("SNIPE_DB", "data/snipe.db"))
+_DB_PATH.parent.mkdir(exist_ok=True)
+
+
+def _get_adapter() -> EbayAdapter:
+    store = Store(_DB_PATH)
+    tokens = EbayTokenManager(
+        client_id=os.environ.get("EBAY_CLIENT_ID", ""),
+        client_secret=os.environ.get("EBAY_CLIENT_SECRET", ""),
+        env=os.environ.get("EBAY_ENV", "production"),
+    )
+    return EbayAdapter(tokens, store, env=os.environ.get("EBAY_ENV", "production"))
+
+
+def _passes_filter(listing, trust, seller, state: FilterState) -> bool:
+    import json
+    if trust and trust.composite_score < state.min_trust_score:
+        return False
+    if state.min_price and listing.price < state.min_price:
+        return False
+    if state.max_price and listing.price > state.max_price:
+        return False
+    if state.conditions and listing.condition not in state.conditions:
+        return False
+    if seller:
+        if seller.account_age_days < state.min_account_age_days:
+            return False
+        if seller.feedback_count < state.min_feedback_count:
+            return False
+        if seller.feedback_ratio < state.min_feedback_ratio:
+            return False
+    if trust:
+        flags = json.loads(trust.red_flags_json or "[]")
+        if state.hide_new_accounts and "account_under_30_days" in flags:
+            return False
+        if state.hide_suspicious_price and "suspicious_price" in flags:
+            return False
+        if state.hide_duplicate_photos and "duplicate_photo" in flags:
+            return False
+    return True
+
+
+def render() -> None:
+    st.title("🔍 Snipe — eBay Listing Search")
+
+    col_q, col_price, col_btn = st.columns([4, 2, 1])
+    query = col_q.text_input("Search", placeholder="RTX 4090 GPU", label_visibility="collapsed")
+    max_price = col_price.number_input("Max price $", min_value=0.0, value=0.0,
+                                       step=50.0, label_visibility="collapsed")
+    search_clicked = col_btn.button("Search", use_container_width=True)
+
+    if not search_clicked or not query:
+        st.info("Enter a search term and click Search.")
+        return
+
+    with st.spinner("Fetching listings..."):
+        try:
+            adapter = _get_adapter()
+            filters = SearchFilters(max_price=max_price if max_price > 0 else None)
+            listings = adapter.search(query, filters)
+            adapter.get_completed_sales(query)  # warm the comps cache
+        except Exception as e:
+            st.error(f"eBay search failed: {e}")
+            return
+
+    if not listings:
+        st.warning("No listings found.")
+        return
+
+    store = Store(_DB_PATH)
+    for listing in listings:
+        store.save_listing(listing)
+        if listing.seller_platform_id:
+            seller = adapter.get_seller(listing.seller_platform_id)
+            if seller:
+                store.save_seller(seller)
+
+    scorer = TrustScorer(store)
+    trust_scores = scorer.score_batch(listings, query)
+    pairs = list(zip(listings, trust_scores))
+
+    opts = build_filter_options(pairs)
+    filter_state = render_filter_sidebar(pairs, opts)
+
+    sort_col = st.selectbox("Sort by", ["Trust score", "Price ↑", "Price ↓", "Newest"],
+                            label_visibility="collapsed")
+
+    def sort_key(pair):
+        l, t = pair
+        if sort_col == "Trust score": return -(t.composite_score if t else 0)
+        if sort_col == "Price ↑":    return l.price
+        if sort_col == "Price ↓":    return -l.price
+        return l.listing_age_days
+
+    sorted_pairs = sorted(pairs, key=sort_key)
+    visible = [(l, t) for l, t in sorted_pairs
+               if _passes_filter(l, t, store.get_seller("ebay", l.seller_platform_id), filter_state)]
+    hidden_count = len(sorted_pairs) - len(visible)
+
+    st.caption(f"{len(visible)} results · {hidden_count} hidden by filters")
+
+    for listing, trust in visible:
+        seller = store.get_seller("ebay", listing.seller_platform_id)
+        render_listing_row(listing, trust, seller)
+
+    if hidden_count:
+        if st.button(f"Show {hidden_count} hidden results"):
+            visible_ids = {(l.platform, l.platform_listing_id) for l, _ in visible}
+            for listing, trust in sorted_pairs:
+                if (listing.platform, listing.platform_listing_id) not in visible_ids:
+                    seller = store.get_seller("ebay", listing.seller_platform_id)
+                    render_listing_row(listing, trust, seller)
diff --git a/app/ui/__init__.py b/app/ui/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/ui/components/__init__.py b/app/ui/components/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/app/ui/components/filters.py b/app/ui/components/filters.py
new file mode 100644
index 0000000..94e54f5
--- /dev/null
+++ b/app/ui/components/filters.py
@@ -0,0 +1,118 @@
+"""Build dynamic filter options from a result set and render the Streamlit sidebar."""
+from __future__ import annotations
+import json
+from dataclasses import dataclass, field
+from typing import Optional
+import streamlit as st
+from app.db.models import Listing, TrustScore
+
+
+@dataclass
+class FilterOptions:
+    price_min: float
+    price_max: float
+    conditions: dict[str, int]        # condition → count
+    score_bands: dict[str, int]       # safe/review/skip → count
+    has_real_photo: int = 0
+    has_em_bag: int = 0
+    duplicate_count: int = 0
+    new_account_count: int = 0
+    free_shipping_count: int = 0
+
+
+@dataclass
+class FilterState:
+    min_trust_score: int = 0
+    min_price: Optional[float] = None
+    max_price: Optional[float] = None
+    min_account_age_days: int = 0
+    min_feedback_count: int = 0
+    min_feedback_ratio: float = 0.0
+    conditions: list[str] = field(default_factory=list)
+    hide_new_accounts: bool = False
+    hide_marketing_photos: bool = False
+    hide_suspicious_price: bool = False
+    hide_duplicate_photos: bool = False
+
+
+def build_filter_options(
+    pairs: list[tuple[Listing, TrustScore]],
+) -> FilterOptions:
+    prices = [l.price for l, _ in pairs if l.price > 0]
+    conditions: dict[str, int] = {}
+    safe = review = skip = 0
+    dup_count = new_acct = 0
+
+    for listing, ts in pairs:
+        cond = listing.condition or "unknown"
+        conditions[cond] = conditions.get(cond, 0) + 1
+        if ts.composite_score >= 80:
+            safe += 1
+        elif ts.composite_score >= 50:
+            review += 1
+        else:
+            skip += 1
+        if ts.photo_hash_duplicate:
+            dup_count += 1
+        flags = json.loads(ts.red_flags_json or "[]")
+        if "new_account" in flags or "account_under_30_days" in flags:
+            new_acct += 1
+
+    return FilterOptions(
+        price_min=min(prices) if prices else 0,
+        price_max=max(prices) if prices else 0,
+        conditions=conditions,
+        score_bands={"safe": safe, "review": review, "skip": skip},
+        duplicate_count=dup_count,
+        new_account_count=new_acct,
+    )
+
+
+def render_filter_sidebar(
+    pairs: list[tuple[Listing, TrustScore]],
+    opts: FilterOptions,
+) -> FilterState:
+    """Render filter sidebar and return current FilterState."""
+    state = FilterState()
+
+    st.sidebar.markdown("### Filters")
+    st.sidebar.caption(f"{len(pairs)} results")
+
+    state.min_trust_score = st.sidebar.slider("Min trust score", 0, 100, 0, key="min_trust")
+    st.sidebar.caption(
+        f"🟢 Safe (80+): {opts.score_bands['safe']}  "
+        f"🟡 Review (50–79): {opts.score_bands['review']}  "
+        f"🔴 Skip (<50): {opts.score_bands['skip']}"
+    )
+
+    st.sidebar.markdown("**Price**")
+    col1, col2 = st.sidebar.columns(2)
+    state.min_price = col1.number_input("Min $", value=opts.price_min, step=50.0, key="min_p")
+    state.max_price = col2.number_input("Max $", value=opts.price_max, step=50.0, key="max_p")
+
+    state.min_account_age_days = st.sidebar.slider(
+        "Account age (min days)", 0, 365, 0, key="age")
+    state.min_feedback_count = st.sidebar.slider(
+        "Feedback count (min)", 0, 500, 0, key="fb_count")
+    state.min_feedback_ratio = st.sidebar.slider(
+        "Positive feedback % (min)", 0, 100, 0, key="fb_ratio") / 100.0
+
+    if opts.conditions:
+        st.sidebar.markdown("**Condition**")
+        selected = []
+        for cond, count in sorted(opts.conditions.items()):
+            if st.sidebar.checkbox(f"{cond} ({count})", value=True, key=f"cond_{cond}"):
+                selected.append(cond)
+        state.conditions = selected
+
+    st.sidebar.markdown("**Hide if flagged**")
+    state.hide_new_accounts = st.sidebar.checkbox(
+        f"New account (<30d) ({opts.new_account_count})", key="hide_new")
+    state.hide_suspicious_price = st.sidebar.checkbox("Suspicious price", key="hide_price")
+    state.hide_duplicate_photos = st.sidebar.checkbox(
+        f"Duplicate photo ({opts.duplicate_count})", key="hide_dup")
+
+    if st.sidebar.button("Reset filters", key="reset"):
+        st.rerun()
+
+    return state
diff --git a/app/ui/components/listing_row.py b/app/ui/components/listing_row.py
new file mode 100644
index 0000000..34fbd54
--- /dev/null
+++ b/app/ui/components/listing_row.py
@@ -0,0 +1,85 @@
+"""Render a single listing row with trust score, badges, and error states."""
+from __future__ import annotations
+import json
+import streamlit as st
+from app.db.models import Listing, TrustScore, Seller
+from typing import Optional
+
+
+def _score_colour(score: int) -> str:
+    if score >= 80: return "🟢"
+    if score >= 50: return "🟡"
+    return "🔴"
+
+
+def _flag_label(flag: str) -> str:
+    labels = {
+        "new_account":            "✗ New account",
+        "account_under_30_days":  "⚠ Account <30d",
+        "low_feedback_count":     "⚠ Low feedback",
+        "suspicious_price":       "✗ Suspicious price",
+        "duplicate_photo":        "✗ Duplicate photo",
+        "established_bad_actor":  "✗ Bad actor",
+        "marketing_photo":        "✗ Marketing photo",
+    }
+    return labels.get(flag, f"⚠ {flag}")
+
+
+def render_listing_row(
+    listing: Listing,
+    trust: Optional[TrustScore],
+    seller: Optional[Seller] = None,
+) -> None:
+    col_img, col_info, col_score = st.columns([1, 5, 2])
+
+    with col_img:
+        if listing.photo_urls:
+            # Spec requires graceful 404 handling: show placeholder on failure
+            try:
+                import requests as _req
+                r = _req.head(listing.photo_urls[0], timeout=3, allow_redirects=True)
+                if r.status_code == 200:
+                    st.image(listing.photo_urls[0], width=80)
+                else:
+                    st.markdown("📷 *Photo unavailable*")
+            except Exception:
+                st.markdown("📷 *Photo unavailable*")
+        else:
+            st.markdown("📷 *No photo*")
+
+    with col_info:
+        st.markdown(f"**{listing.title}**")
+        if seller:
+            age_str = f"{seller.account_age_days // 365}yr" if seller.account_age_days >= 365 \
+                      else f"{seller.account_age_days}d"
+            st.caption(
+                f"{seller.username} · {seller.feedback_count} fb · "
+                f"{seller.feedback_ratio*100:.1f}% · member {age_str}"
+            )
+        else:
+            st.caption(f"{listing.seller_platform_id} · *Seller data unavailable*")
+
+        if trust:
+            flags = json.loads(trust.red_flags_json or "[]")
+            if flags:
+                badge_html = " ".join(
+                    f'<span style="background:#c33;color:#fff;padding:1px 5px;'
+                    f'border-radius:3px;font-size:11px">{_flag_label(f)}</span>'
+                    for f in flags
+                )
+                st.markdown(badge_html, unsafe_allow_html=True)
+            if trust.score_is_partial:
+                st.caption("⚠ Partial score — some data unavailable")
+        else:
+            st.caption("⚠ Could not score this listing")
+
+    with col_score:
+        if trust:
+            icon = _score_colour(trust.composite_score)
+            st.metric(label="Trust", value=f"{icon} {trust.composite_score}")
+        else:
+            st.metric(label="Trust", value="?")
+        st.markdown(f"**${listing.price:,.0f}**")
+        st.markdown(f"[Open eBay ↗]({listing.url})")
+
+    st.divider()
diff --git a/app/wizard/__init__.py b/app/wizard/__init__.py
new file mode 100644
index 0000000..70e86af
--- /dev/null
+++ b/app/wizard/__init__.py
@@ -0,0 +1,3 @@
+from .setup import SnipeSetupWizard
+
+__all__ = ["SnipeSetupWizard"]
diff --git a/app/wizard/setup.py b/app/wizard/setup.py
new file mode 100644
index 0000000..2ac8187
--- /dev/null
+++ b/app/wizard/setup.py
@@ -0,0 +1,52 @@
+"""First-run wizard: collect eBay credentials and write .env."""
+from __future__ import annotations
+from pathlib import Path
+import streamlit as st
+from circuitforge_core.wizard import BaseWizard
+
+
+class SnipeSetupWizard(BaseWizard):
+    """
+    Guides the user through first-run setup:
+    1. Enter eBay Client ID (EBAY_CLIENT_ID) + Secret (EBAY_CLIENT_SECRET)
+    2. Choose sandbox vs production
+    3. Verify connection (token fetch)
+    4. Write .env file
+    """
+
+    def __init__(self, env_path: Path = Path(".env")):
+        self._env_path = env_path
+
+    def run(self) -> bool:
+        """Run the setup wizard. Returns True if setup completed successfully."""
+        st.title("🎯 Snipe — First Run Setup")
+        st.info(
+            "To use Snipe, you need eBay developer credentials. "
+            "Register at developer.ebay.com and create an app to get your Client ID (EBAY_CLIENT_ID) and Secret (EBAY_CLIENT_SECRET)."
+        )
+
+        client_id = st.text_input("eBay Client ID (EBAY_CLIENT_ID)", type="password")
+        client_secret = st.text_input("eBay Client Secret (EBAY_CLIENT_SECRET)", type="password")
+        env = st.selectbox("eBay Environment", ["production", "sandbox"])
+
+        if st.button("Save and verify"):
+            if not client_id or not client_secret:
+                st.error("Both Client ID and Secret are required.")
+                return False
+            # Write .env
+            self._env_path.write_text(
+                f"EBAY_CLIENT_ID={client_id}\n"
+                f"EBAY_CLIENT_SECRET={client_secret}\n"
+                f"EBAY_ENV={env}\n"
+                f"SNIPE_DB=data/snipe.db\n"
+            )
+            st.success(f".env written to {self._env_path}. Reload the app to begin searching.")
+            return True
+        return False
+
+    def is_configured(self) -> bool:
+        """Return True if .env exists and has eBay credentials."""
+        if not self._env_path.exists():
+            return False
+        text = self._env_path.read_text()
+        return "EBAY_CLIENT_ID=" in text and "EBAY_CLIENT_SECRET=" in text
diff --git a/tests/ui/__init__.py b/tests/ui/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/ui/test_filters.py b/tests/ui/test_filters.py
new file mode 100644
index 0000000..fd716bf
--- /dev/null
+++ b/tests/ui/test_filters.py
@@ -0,0 +1,38 @@
+from app.db.models import Listing, TrustScore
+from app.ui.components.filters import build_filter_options
+
+
+def _listing(price, condition, score):
+    return (
+        Listing("ebay", "1", "GPU", price, "USD", condition, "u", "https://ebay.com", [], 1),
+        TrustScore(0, score, 10, 10, 10, 10, 10),
+    )
+
+
+def test_price_range_from_results():
+    pairs = [_listing(500, "used", 80), _listing(1200, "new", 60)]
+    opts = build_filter_options(pairs)
+    assert opts.price_min == 500
+    assert opts.price_max == 1200
+
+
+def test_conditions_from_results():
+    pairs = [_listing(500, "used", 80), _listing(1200, "new", 60), _listing(800, "used", 70)]
+    opts = build_filter_options(pairs)
+    assert "used" in opts.conditions
+    assert opts.conditions["used"] == 2
+    assert opts.conditions["new"] == 1
+
+
+def test_missing_condition_not_included():
+    pairs = [_listing(500, "used", 80)]
+    opts = build_filter_options(pairs)
+    assert "new" not in opts.conditions
+
+
+def test_trust_score_bands():
+    pairs = [_listing(500, "used", 85), _listing(700, "new", 60), _listing(400, "used", 20)]
+    opts = build_filter_options(pairs)
+    assert opts.score_bands["safe"] == 1    # 80+
+    assert opts.score_bands["review"] == 1  # 50–79
+    assert opts.score_bands["skip"] == 1    # <50