The single most important habit in reselling is pricing by sold data, not by what other sellers are asking. These tools show real completed sales so you can set a max buy price before you pay.
| # | Tool | Price (checked Oct 2026) | Why it is here |
|---|---|---|---|
| 1 | Terapeak (eBay Product Research) | Free with an eBay seller account | Free with an eBay seller account and the best general-purpose sold-data source. |
| 2 | Google Lens | Free | Free. Identify an unknown item from a photo, then look up its sold comps. |
| 3 | WorthPoint | All Access $29.99/mo or $305.90/yr | Huge historical archive for antiques and vintage; All Access is $29.99/mo. |
| 4 | 130point | Free | Free sold-price lookups for sports and trading cards, including Best Offer prices. |
| 5 | PriceCharting | Free lookups; Collector $6/mo, Legendary $49/mo | Free loose / complete / new prices for video games and more; paid plans from $6/mo. |
Free with an eBay seller account and the best general-purpose sold-data source.
Terapeak is eBay's built-in product research tool, available free in Seller Hub. It shows up to several years of sold data on eBay: average sold price, sell-through rate, shipping cost and top listings. It is the fastest way to answer 'what does this actually sell for on eBay?' and to choose between auction and fixed-price formats.
Pros: Free and official eBay data; Years of sold history; Shows sell-through and average shipping. Cons: eBay data only; Requires an eBay seller account.
Full Terapeak (eBay Product Research) review
Free. Identify an unknown item from a photo, then look up its sold comps.
Google Lens identifies an item from a photo and finds visually similar products online. For flippers it is the quickest way to put a name, brand or model number on an unmarked object before checking sold comps elsewhere.
Pros: Free and instant; Works on almost any object; Built into Google app and Android camera. Cons: Shows retail and asking prices, not sold data; Can misidentify niche items.
Huge historical archive for antiques and vintage; All Access is $29.99/mo.
WorthPoint aggregates hundreds of millions of historical sold prices from eBay and auction houses, plus marks and maker databases. It is a go-to for valuing antiques, vintage goods and collectibles where recent comps are thin and older sales matter.
Pros: Huge historical archive; Maker's marks and identification guides; Covers auction-house results. Cons: Subscription is pricey for casual use; Less useful for modern commodity items.
Free sold-price lookups for sports and trading cards, including Best Offer prices.
130point lets you search eBay sold listings and, importantly, reveals the accepted price on Best Offer sales, which eBay normally hides. It is a staple for sports card and collectible pricing.
Pros: Shows accepted Best Offer prices; Free; Fast search. Cons: Focused on eBay data; Basic interface.
Free loose / complete / new prices for video games and more; paid plans from $6/mo.
PriceCharting tracks prices for loose, complete-in-box and new video games, plus trading cards, comics and more, based on completed sales. Collection tracking and price alerts make it useful for both buying and inventory valuation.
Pros: Clear loose/CIB/new pricing; Covers games, cards, comics, LEGO; Free core lookups. Cons: Pro features require subscription; Thin data on obscure titles.
Identify the item (Lens), search sold listings for the exact model and condition, take the median of the last 5-10 sales, subtract fees and shipping, then decide your max buy. The Flip Profit Calculator automates that last step.
Yes: filter any eBay search by Sold items, and use Terapeak (free for sellers) for up to several years of history.
Flip Profit Calculator ($12)
Spreadsheet that returns net proceeds, max buy price, ROI and a GO / COUNTER / PASS decision with fees for 10 platforms, plus a 500-row flip log and dashboard.
Marketplace Pricing Cheat Sheet ($7)
Fees for 8 resale platforms, max-buy and ROI formulas, comp check, net payout table and shipping reference on 6 printable pages.
Instant digital downloads sold via Gumroad.
Fees and prices were checked on October 17, 2026 and change often. Always confirm on the platform's own fee page.