When I first started selling on ebay, I wondered why they always seemed to charge buyers a bit more for shipping then what they charged me. Eventually I realize

When I first started selling on ebay, I wondered why they always seemed to charge buyers a bit more for shipping then what they charged me. Eventually I realized that the difference was their fee and it looked odd but actually worked out fine. Apparently enough other people were confused by this that they stopped doing it. So now it looks right on the surface, but ends up worse for sellers. Also, one time I sold two items for the exact same price + shipping, and noticed ebay charged slightly different fees. The buyers were in different states and paid different amounts of tax. That's when I realized ebay charged me a fee on the tax. I suppose they're paying the credit card processor a fee on the total amount including tax, so maybe that makes sense, but I wish they were a bit more upfront about it.