I've witnessed on several occasions where bids are shilled by the seller who uses another account so in effect he's bidding on his own item and against all real buyers. Don't expect eBay to do anything about it either as I nailed one guy 100% for doing this exact thing. Nothing happened but he doesn't use that shill account anymore (probably is doing it with other shill accounts)

Anthony (eBay, not all is as it seems.....)