Set your rule
Choose the minimum profit, margin or ROI you expect from a deal.
BUYING CEILING FOR UK RESELLERS
Know your buying ceiling before you buy.
BuyFloor is a manual eBay UK profit calculator that estimates your conservative maximum buy price from the sale price, fees and costs you enter.
Manual entryLocal storageNo eBay login
Add BuyFloor to Chrome
Available now on the Chrome Web Store. Free to use; no account required.
BuyFloorBuying ceiling
MEETS YOUR BUYING RULE
Pay up to £43.00 At the buying ceiling, this example still meets its saved rule.£13.18expected profit15.5%margin30.7%ROI
Illustrative interface preview. Results depend on the values and assumptions entered.
ONE DECISION, MADE CLEAR
From sourcing hunch to a number you can act on.
Enter the opportunity
Add a realistic sale price, item purchase price and fulfilment costs.
See the ceiling
BuyFloor shows the most you can pay and the gap to negotiate.
SIMPLE PRICING
Start free. Upgrade when your shortlist becomes a workflow.
The calculator stays useful without an account. Pro adds organisation and export tools while your deal data remains on this device.
£0
For occasional sourcing decisions.
- Unlimited calculations
- Up to five saved decisions
- Buying rules and fee breakdowns
£9.99 / month
Or £89 per year (£7.42/month). Not yet available in the current Web Store build.
- Unlimited saved decisions
- Search, private notes and three-deal comparison
- CSV export and local backup/restore
When v1.1 is approved, secure checkout and billing will be provided by Stripe. Cancel renewal from Manage billing; the portal shows when access ends before you confirm. Your saved local data stays readable after Pro ends.
BUILT FOR TRUST
Your deal data stays on your device.
BuyFloor has no analytics or advertising and does not read eBay pages or research sold listings. Your calculations, buying rule and saved decisions stay in Chrome’s local extension storage. The upcoming v1.1 release adds an optional account used only to verify Pro access; Supabase handles sign-in, Vercel hosts the billing API and Stripe handles payment.