The fees are higher if they pay with a credit card.
I've never sold stuff on eBay, but I'm thinking of it. The way I feel about it is, if I don't sell it, it would be going to the thrift store so anything I get for it is a bonus. Most of the time we want to get rid of stuff, we put it on craigslist for free. Once we decide who gets it, we tell them it will be on the porch to pick up. Can't do that if I want money, so it'll be eBay.