Re: The car selling nightmare.
We've all had this happen, and its annoying, but I never have any expectations, so I'm not over worried by no shows. What I try and do is pin callers down to a time, and get a phone number off them "Just in case I have to go out". You can often judge the level of commitment by the reply.
What was new on me the other week was two questions from potential ebay buyers. One was attempting to redirect me to another site. I reported that to ebay and they confirmed the account had been hijacked by a third party. Not nice. The other email I got was from someone apparently just wanting a chat about Alfas from abroad..which had a funny smell about it, and I felt it might have been an attempt to get account details from me. So I deleted it without reply.
A friend sold his car, and the bankers draft was a forgery. The insurance co did not pay as they said he had not been vigilant enough, and should not have released the car before funds were confirmed as transferred.
The no-shows are just an irritant compared with the nasty b*stards, who are bent on theft.