Since he's so adamant, offer him a drive to your dealership, see if you can find a replacement for yours right away and sell him yours, or give him an opportunity to choose one that may be available then and there. At the end you'll both win. You'll get a chance to get a another car that may be better or to keep yours if it's perfectly suited; and he'll get a chance to see if he can get the one he wants. If no car is readily available, he'll know where to get one when the time comes, and you'll gain his and the dealer's considerations. Furthermore, you won't feel any greedy remorse.
Or is this a metaphorical exercise for your (our) adulation?