Between you saying you "don't know much about eBay" and "there seems to be a fee"(is there a fee or not? How can it seem like there's a fee?), you pretty much said yourself you shouldn't be commenting on eBay. Yes it's personal experience, but it's a personal experience you didn't have, but rather are assuming you would have.
I've bought/sold quite a few coins on eBay(in the range of 200 selling, 250 buying. Thank you gold prices

), with a decent number costing many times more than a Mac Pro, and have never had a bad experience.