ive imported alot of cars from the states into canada. as a seller all you need to provide the buyer is the title, and a bill of sale.it is the buyers responsibility to handle the rest. at that point as an american seller you have the same amount of work to do as if you were selling to an american.I wouldnt bother trying to do their export for them but assist in faxing documents etc. just ask them for cash or a wire transfer, or a Us postal money order.Alot of american banks are holding canadian drafts and certified cheques for upto a month now.and dont let the car leave you until you have verified funds.