QuickSoldCheck

Auto-detect product model numbers on any page and check eBay sold listings instantly — see if it sells and for how much.

Find out whether an item sells on eBay — and for how much — in seconds, right where you are sourcing it. Open any product page and QuickSoldCheck detects the model number automatically, then shows eBay sold listings (what the item actually sold for) in your browser side panel. No switching tabs, no re-typing searches into eBay. It is not limited to watches. Cameras, lenses, audio gear — any product with a model number. Use it to check the going rate on used items, decide what to buy for resale, or research what a collectible is worth. ── Made for moments like ── ● You found something at a thrift store or flea market and want to know its eBay price ● You want to confirm an item actually sells before you buy it ● You want a quick read on what your existing inventory is worth right now ── Free features ── ● Keyword search 　Type a keyword into the side panel and search. No daily limit. ● Automatic model number detection 　Model numbers are detected on the page you are viewing — search with one click. ● Search from selected text [10/day] 　Select text on any page and a search button appears. Tap to search instantly. ● Auto-search on selection [10/day] 　Just select text and the search runs automatically. No click needed. ● Profit / ROI calculator [3/day] 　Enter buy price, fees and shipping to see your profit and margin on the spot. ● Collapsible controls 　Fold away the entire control area with one tap when you want more room for results. ── Pro features ── ✦ Unlimited search from selected text ✦ Unlimited profit / ROI calculator ✦ Custom category buttons (up to 10) to narrow results 　 → choose from 55+ preset categories ✦ Date range filter (7 / 14 / 30 / 60 / 90 days or custom) ✦ Live USD → JPY conversion ¥1,490/month or ¥14,900/year (17% off) You can cancel anytime from the "✨ Pro" badge inside the extension. After cancelling, Pro stays active until the end of the period you already paid for. ── Privacy ── We collect and transmit no user data. There is no analytics and no tracking of any kind. Your settings and license key are stored only in your own browser. Privacy policy: https://dartmass.github.io/quicksoldcheck-site/privacy-policy.html ── Changelog ── v2.2.1 Updated pricing (¥1,490/month, ¥14,900/year). Existing subscriptions keep the price they signed up at. v2.2.0 Added a route to manage or cancel your Pro subscription — while Pro is active, the "✨ Pro" badge in the header opens cancellation and payment changes (Polar customer portal). Fixed a bug where the license check was not applied correctly, so free plan limits now work as intended. Added periodic license re-validation; Pro is never revoked because you were offline or hit a network error. v2.1.4 Added a fee mode toggle (% or fixed yen) and a shipping slider to the profit/ROI calculator. Improved selection search so it no longer picks up prices and other stray numbers. v2.1.3 Added collapsible search controls and an English UI. v2.1.2 Horizontal scrolling for categories, capped at 10. v2.1.1 Added customizable category buttons (Pro). v2.1.0 Search eBay sold listings just by selecting text (10/day free, unlimited on Pro). v2.0.1 Added onboarding (first-run tutorial).