Here's a list of most (not all) fees you can get charged for selling on eBay. Insertion fees, Final value fees, Basic fees for most categories, Fees for Real Estate listings, Fees for optional listing upgrades, Additional final value fees, Dispute fee, International fee. They make it incredibly hard to calculate fees and my experience has been about 10% of selling price for items $100-$350. Should be criminal and I'd recommend almost any other marketplace to sell you items. App crashes a lot.