I use Auctionsniper.com for ebay. Though I don't buy an awful lot, I have yet to have any issues with it. As for the listing format for ebay, it is dreadful. I've got some stuff I want to put up there but have procrastinated because it takes awhile. I first got on ebay in '97 or '98 I believe. It was so quick and easy to list, I could list a boatload of cards in 1/2 an hour. Now it seems to take that long to list 5 items. What a pain.
