eBay Tools
Buying at auction to resell on eBay or Amazon? These tools show you the real numbers — all-in costs, fees and margins — before you commit to a bid or a listing.
Auction Bid Calculator
The hammer price is only half the story.
Commission, VAT and lot fees quietly add 20–30% to every auction win — and most bidders only find out after they've won. Auction Bid Calculator opens as a sidebar right on the lot page and shows your all-in cost before you bid, plus what the lot is really worth if you resell it on eBay or Amazon.
True auction cost Free · unlimited
Hammer price + commission + VAT + per-unit maths, computed live as you type. Commission rates are read automatically from the lot page, so you know your walk-away number before bidding opens.
eBay fee & profit engine Free · unlimited
The full UK fee table — tiered final value fees, fixed order fees, regulatory fee, seller levels and international rates — with break-even analysis and 10–50% profit targets. Rates update from our servers, so they're always current.
Amazon resale check 10 free / month
Type an ASIN and get live FBA fees, referral rates and the 30-day average Buy Box price — an instant net-profit and ROI verdict on flipping the lot to Amazon.
Works on bidspotter.co.uk · bidspotter.com · i-bidder.com
Honest pricing
Free
Unlimited auction and eBay calculations — they run entirely in your browser, no account needed. Plus 10 Amazon checks a month.
Pro
Unlimited Amazon resale checks with live market data. No ads, no data selling — cancel in two clicks.
or £49 / year — save 18%More eBay tools are on the way. Want something built for how you buy and sell?
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