I have had a couple of bad experiences recently. Firstly I sold my summer bike, lot's of questions from the eventual buyer beforehand. Three days after he won, and after discussing suitable dates/times for him to pick up, he decides that he lives too far away and wants me to cancel the auction. Three days after all that he has changed his mind and wants the bike. Unfortunately for him I had contacted the guy who missed out by a tenner and offered it to him. I took great pleasure in telling the original buyer that he had missed out. My second experience was just yesterday, I purchased a computer monitor that included free delivery. Three hours after I had paid the seller decides that he should have charged for delivery and cancels the sale with the reason that I did not supply a delivery address