Hopefully things work out.
It would suck if he stiffed you on the games or tried to charge you shipping for them.
indeed. Make sure it is understood that you will not be paying shipping & / or any other amount for the games. It was his fault & he needs to fix it.
Mario is missing really sucks! But it's not common, making it a difficult title to pick up. I hope he is good for it as well. 3 of the 4 games are common's, so maybe it was just a mistake.