FlipCheck: One-Click Profit Snapshot

FlipCheck is a one-click profit calculator for online resellers. Open an eBay, Depop, or Poshmark listing, hit the extension, and get an instant estimate of profit, ROI, and a clear GOOD / BORDERLINE / PASS signal so you stop guessing on flips.

Perfect for

• Part-time and full-time resellers
• eBay / Depop / Poshmark sellers and thrifters
• Arbitrage flippers checking deals in-store or online

What FlipCheck shows you

• Estimated profit in dollars (after marketplace fees, optional tax, and shipping)

• ROI % on your total cost

• GOOD / BORDERLINE / PASS badge so decisions are fast, not emotional

• Breakdown boxes for:

  • Buy price
  • Estimated sale price (from recent comps where available)
  • Shipping used
  • Fees + tax (with a clear dollar breakdown)

Smarter marketplace math

• eBay: uses your fee %, shipping, and optional tax.
• Depop: tuned defaults for typical Depop fees and shipping.
• Poshmark: uses your % but also respects the classic rule of “20% or $2.95 minimum,” so low-priced items don’t show fake profits.

You can tweak:

• Marketplace fee %
• Default shipping cost
• Tax % (optional)

…and save those as your new defaults with one click.

Buy list & history

• Add to Buy List when a flip looks good.
• Mark as Pass when the math doesn’t work.
• All decisions are stored locally in your browser.

The Profit Summary page shows:

• How many flips you evaluated
• How many you marked Buy vs Pass
• Average estimated profit on your Buy decisions
• Platform labels (eBay / Depop / Poshmark) so you can see where your best flips come from

How to use

1. Install FlipCheck.
2. Open an eBay, Depop, or Poshmark item page.
3. Click the FlipCheck icon and hit “Run FlipCheck.”
4. Review the profit snapshot and badge, adjust any settings if needed.
5. Hit “Add to Buy List” or “Mark as Pass” and move on to the next deal.

Privacy & safety

• No account, no login, no paywall.
• Calculations run in your browser; decisions are saved with Chrome’s local extension storage.
• FlipCheck gives estimates only based on visible data and recent comps. Always double-check your own numbers before buying.

Supporting the extension

FlipCheck is free to use. If it helps you make or save money, there’s an optional “Tip the creator” button that copies the Cash App tag $judeh1l and opens Cash App in a new tab. Tipping is completely optional and never required to use any feature.

Stop eyeballing fees and guessing profit. Let FlipCheck do the boring math so you can focus on finding better flips.