I sold 2 items to a newbie (score of 6). Half an hour later I got the following message:
"I do not want this item thanks"
That was it, no apology, no explanation, nothing!
I have a shop and mainly sell BIN, but I do not like the Require Immediate Payment as I have a lot of multiple orders. But twats like this really piss me off and make me wonder if I should. 
Aaaaargh!