[FU]

I'd accept a bank certified check with the VIN written on it. When you receive the check call the issuing bank and give them the certified check number to see if it's legit. Or just take the check to your bank and have them call the issuing bank to inquire about the check also documenting the bank representitive's name and the buyer's account etc.
Then if all is ok deposit the check and wait for it to clear. Then ship the vehicle .