Flip Ledger: Watch Margin & Fee Calculator

The math is free. The $9 buys the one thing a spreadsheet can't do: what comparable pieces actually sold for, with the sample size shown. Flip Ledger sits on the watch listing page you already have open. It reads the price on screen, applies your own fee stack, and shows the landed cost, the net proceeds and the margin, in the page, while you are deciding. THE FREE TIER (a complete tool, permanently) - Landed cost, not the sticker price. Hammer or asking price, the auction buyer's premium through your own tier table (bands behave like tax brackets, with an open ended top band), shipping and insurance, import duty, service or repair, parts. - The fee stack for eBay, Chrono24 and dealer to dealer, with a typed override for when your invoice disagrees with the default. - Net proceeds and margin in the page, while you are deciding, not after. - Consignment kept separate. The dealer's share and the consignor's amount are two numbers, never blended into one. Booking a consignment as an owned sale is how the books go wrong. - Your own rates. Every rate and every tier is yours to set once, on the options page. None of that is limited by time, by count, or by an account. It is the whole margin tool, free, and it stays free. THE PAID PART ($9 once, no subscription): THE COMPS VIEW The paid part is not a bigger version of the free tier. It is a different category of information: what comparable pieces actually sold for, with the sample size shown on every figure. - Comps, supplied for you. As of 21 September 2026 that is more than 1,200 sold reference level aggregates over 1,900 sold observations, across 21 brands, each shown as a median with the sample count, the range and the date span behind it. - Honest by construction. When we hold nothing for a reference, it says so plainly. Nothing is estimated. Asking prices are labelled as asking and are never dressed up as sold prices. - The figures carry their own date span, so you can see how fresh they are. WHAT IT DOES NOT DO It does not buy, bid, list or sell anything for you. It does not touch your accounts, your cookies or your passwords. It reads the price on the listing page you are viewing. PRIVACY, PLAINLY Your watches, sales, rates and observations stay on your computer. The free tier makes no network call at all. When you use the comps view, the extension reads our comps file from our own host, and it checks your licence key with Gumroad. Those two requests are the only network calls in the product. The licence request sends your key and nothing else. No browsing history is collected, no account is needed, and nothing about you is sold. WHO IS SELLING THIS The free extension is published by us, the developer, not by Google. The paid part is sold by us through Gumroad. Google is not the seller of anything here. REFUNDS If it is not useful to you, reply within 14 days and we refund the purchase in full. No form to fill in.