Profitable flipping starts with a comp check: the price an item actually sold for recently, not the asking price. These tools surface sold data, price history and sell-through so you can set a max buy price before you hand over cash. Most resellers combine a free source (eBay sold listings or Terapeak) with one specialist tool for their main category.
| Tool | Price | Free option | Best for |
|---|---|---|---|
| Terapeak (eBay Product Research) | Free with an eBay seller account | Yes | Every eBay seller checking sold prices and sell-through |
| WorthPoint | All Access $29.99/mo or $305.90/yr | Limited free lookups | Antique, vintage and collectibles flippers |
| Google Lens | Free | Yes | Identifying unknown items in the field |
| ZIK Analytics | eBay Pro $39.90/mo ($19.90 first month) or $14/mo billed yearly; Pro+ $59.90/mo | $1 trial | eBay sellers doing product and competitor research |
Waitlist open for NYC/NJ auction-house and estate-sale lots, ranked for resellers. See this week's sample or join the waitlist.
Best for: Every eBay seller checking sold prices and sell-through
Price: Free with an eBay seller account
Best for: Antique, vintage and collectibles flippers
Price: All Access $29.99/mo or $305.90/yr
Best for: Identifying unknown items in the field
Price: Free
Best for: eBay sellers doing product and competitor research
Price: eBay Pro $39.90/mo ($19.90 first month) or $14/mo billed yearly; Pro+ $59.90/mo
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.
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.
Instant digital downloads sold via Gumroad.