I get why you want games to stay, but the buyer should be under no obligation to leave his/her games at a show. If the vendor refused to let them take the games then the vendor should have refused to take the money. The vendor essentially stole those games for 3 days.

That's not how it was presented. the post said he sold them, then said no way you can't have them. If its agreed to that's fine. That's not what was implied.
I get that the vendor wants to have things to show off. but at the same time if the buyer wants to take something home, the vendor needs to decide do I want the stuff here, or do I want the cash?
All the "non-machine" vendors give you your stuff, art, shirts etc. if someone came in and wanted the whole table would the vendor be right to say sorry its gotta stay here since I'll have nothing to show?
Dan runs a great show, I've had games there in the past and will in the future, but its just wrong for a buyer to be forced to leave a game on the floor is they don't want to. As soon as that game changes hands the seller (vendor or private) should lose any privileges that came with the game. If the buyer wants to take the game, they do not get those privileges, they go back to the show.

It was snowing why would you need the A/C