He used you, and let's be honest a 5 hour drive one way in a Ford explorer is easily near a tank of gas, you'd be spending 100 in gas and 10 hours alone just to hand deliver the game (because he has to get it before work) I'd tell him you're keeping it, he wasted your time and your mother's time, and your friends time, all so he could make another deal and go back on his word. Tell him if he charges back, you will name him here and no one will ever deal with him again.