buyer/seller integrity question

I understand totally. It's a honor/ pride thing that's bugging you. But you already dropped the price alot. Then he doesn't come look at it and pulls the trigger buying it. His fault. Now he wants 5k off on top. Get the f out of here. At that amount you may as well gave him the car free. He thinks he has you by the balls now cause he has the car. I say good day sir and move on