Auction & Bidding Tools
Free, practical tools for smart bidders and deal hunters — set your max bid, break down auction fees, find the next increment, time your snipe, measure a discount, and compare the true landed cost. Informational estimates only.
Max Bid Calculator
Work backwards from your total budget — minus shipping, sales tax, and any buyer's premium or platform fee — to the highest hammer bid you can place, plus the all-in cost at that bid
Auction Fee Calculator
See both sides of a sale: the seller's net proceeds after final-value and payment fees, and the buyer's all-in cost with shipping and buyer's premium, with a full fee breakdown
Bid Increment Calculator
Enter the current high bid and get the next minimum bid from a documented eBay-style increment tier table — plus a few steps ahead so you can see where a bidding war is heading
Snipe Timing Calculator
Give the auction's close time and your lead in seconds and get the exact moment to place your snipe, with the countdown to your bid and to the close against your reference time
Deal Savings Calculator
Compare list price against sale or auction price, stack a coupon, and see the amount saved, savings percent, final price, and price per unit — with a check on your target discount
Landed Cost Calculator
Add item price, shipping, import duty or tax, and handling for the true delivered cost, then compare two listings to see whether cheap-item-plus-shipping beats pricier-with-free-shipping