The only people who profit from a sale are eBay and the post office.
eBay is a joke. I hope another company dethrone it in the future.
eBay is schill bidder heaven. The company won't do a damn thing about schill bidders, even if it's so obvious. Why should they? The more you can sell it, the more eBay makes. And they now scrabble all bidder user names so it's hard for you to report or track schill bidders.
Actually, the only people who gets screwed are the genuine buyers.
If you are a seller, make sure you have a second account to schill bid (like you wife's or relatives). You won't get caught, believe me. eBay is stupid.
I don't participate at eBay auctions for the above reasons.