I sold one last December.
All of the terms were agreed to by both of us via emails and followed up with letters as the following transpired.
The buyer pay pal'd me a 500.00 non refundable deposit.
He then sent a 5K cashiers check, also non refundable until he could get his loan approved. Once it was approved he sent the balance in another cashiers check. Once it cleared the bank. I sent the title. He arranged the transportation and away it went. All mailings were done via Fed ex overnite delivery.