if you have the title the car is still legally yours.. does he have a bill of sale/ reciept? if he doesnt answer calls or emails then you have no choice but to re-sell the car, take what you think is owed to you for storage fees and paypal fees and personal fees. i.e the stress brought to you by the buyer. then refund him whats left and re-sell the car. its that simple. and in my eyes its a win win.