Tell him he doesn't need to do that. He can meet you at your bank and he can give the full amount in cashier's check (or whatever form of payment) to the banker. Your banker will then get the buyer's information and either tell the buyer he will be getting the title from them in x amount of days or that his lender will have the title and he will be recieving a memorandum title from that bank. Your banker will then give you the difference of the amount the buyer pays if it's more then the pay off.
Either that or he can have two checks ready. One for you and one for the bank. There's also the cash option.
Meeting at the bank is good for both you and the buyer IMO.