ebay makes more money in paypal fees than ebay commissions..that says it all. ebay won't allow sellers to accept cheaper forms of payment. i mean for powersellers they have no risk or no fraud. most fraud is by small time sellers, some of these powersellers have warehouse. more like merchants rather than flea market or garage seller sellers. powersellers commercial sellers is the bread and butter of ebay's business.
Final value fees are 8-12% including the shipping amount, that's not including 4% Paypal fees, listing and store fees. I have over 3000 items for sale on eBay and it costs me $200 per month just to list there before anything has sold. Then I get whacked for 16% on each sale. It wouldn't be so bad if eBay had the traffic and sales the used to but sales are down by nearly 70% since 2010.