Not a purchase but a silly exchange over a sale. Advertised my BMW on eBay and within in an hour I got a message that said:
"You are a f****ing moron, your car is worth £5K, not even fully loaded and you think you'll get nearly double for it... what a w***er".
So I engaged him for a bit of fun and to see if he was looking for a BMW to which he replied 'No, they're shit'. I asked him why he was searching for them then as if I don't want something I don't look for it as doing so would be moronic. This resulted in more insults and him accusing me of calling him thick (which I did) and if I didn't retract the comment he was going to 'sort me out'. I blocked him.
I did however unblock him to tell him it sold for £9K