just go for a strict "cash only, and payment due when the bike leaves my hands". That weeds out 99.9% of the scammers, leaving only money forgers....and has anyone ever actually seen a money forger?

or you take the fake cashier's check, frame it witha brass tag "Someone tryed to scam me and all I got was the fake f**king check", and just sit on it. Get a PO Box for one month for this....it's not like they are going to take criminal action over it...plus if it's a PO Box, your not giving away your home addy...safer that way. Oh, and don't let em get the bike till teh check clears, k?