If 3 cents is the most you've ever lost by shipping an eBay sale, you're doing great. Historically on eBay, 'shipping' charges were whatever the seller said th

If 3 cents is the most you've ever lost by shipping an eBay sale, you're doing great. Historically on eBay, 'shipping' charges were whatever the seller said they are, and so were very often used to pad profit of the seller. So, all the more reason for eBay fees to be a function of price+shipping. Today, eBay is often the middleperson for purchasing the shipping service for an order, so eBay knows exactly how much the seller is paying for that. Although eBay could exclude these actual shipping charges from their fee function, I mostly see disincentive for them to do that. (eBay does offer discounts over USPS list price for shipping, though, so that helps.)