My policy when it comes to payment is pretty simple. I will take most any form of payment: cash, check, wire transfer, money order, etc… but the car will not leave until the payment has cleared.
In the past I have personally used and recommended J.J. Best Banc & Co. for financing. They are very knowledgeable and familiar with financing classic cars in general. They also have great customer service. I will do anything in my power to make the process as simplistic as I can.