Selling to a buyer

I agree. Nobody here can answer that question.. But as for suggestions, tell your buyer the car goes to the first person who comes bearing cash. If you go the deposit route make sure there is a deadline on when full payment is due and that the deposit is not refundable if he changes his mind or can’t come up with the rest of the money.

I would tell him first come, first serve. He may end up wasting a month or more of your time when you end up finding out he can't get the money for your car.

You could tell him to give you a non refundable deposit to hold the car for a week or other time period. Your time is worth something and if he wastes it he needs to give up his deposit. The whole thing sounds FLAKY.