I have often found in the past and know of eBayer's who would 'buy' and then cancel the bids, having friends, services, etc to leave them feedback. Prior you could even use the same IP, eBay has put more and more bots against this and other pirate/black hat techniques that reduce their bottom line. I propose, rather than using fiverr, who one user charges 5 for one feedback, or another who offers 10, but the members are not registered 1 day later. That a group is started of buying and leaving feedback, mutually cancelling the transaction, this would work well... Thoughts?