The best people bid on a machine you have listed on eBay, they make a quick succession of 3 bids so as to thwart people trying to snipe you as the last few seconds start ticking away, win the machine and then, once you send an invoice as normal, deny ever bidding despite you cutting and pasting the bid history clearly and showing it to them. And then when you say that you will contact eBay to protest( and of course, try having the fees stopped) they really go ballistic and get very , very nasty. And when you look through their feed back, you are not the first to have had such an experience. But the crowning glory is to then find you've been left negative feedback for something they denied ever placing a bid on. Some people, eh?