Quoted from Richthofen:If I were you, just tell him you'll hold the game for him.
Yeah, but then you run the risk of him changing his mind after a month or two and you wound up not selling the game losing two minths. What about him coming to take a look and leaving a $300, non refundable deposit with the game to be picked up with in __ months and paid in full? If the time passes with no balance paid, the deposit is yours and you sell the game.