A friend was nearly hit with a similar scam. He advertised a Jaguar and mentioned that somebody in Syndey was interested in it. I said

"what, and he has said that somebody in the UK owes him money is getting them to send you a cheque and you need to wire him the difference?"

"Oh dear, is that dodgy?"

I told him that when the cheque arrives he should drop it off at whatever bank it is supposed to have come from just in case they collate that kind of information.

Gareth