so WTF are you going to do with this stuff? put it in your closet, keep it in "mint" condition, kill anyone who dares to touch it and think how worth it everything was?
Well, if I were to have all those games, I'd open a museum. Buy as many consoles + TVs as possible (old CRTs, if possible, for max realism), pop in as many games as possible. Put up a little placard next to each, describing the history and historical importance of the game. Keep the most popular ones on constantly, but rotate out all the rest. Supplement it with other material - old game magazines, videos, etc. Do some proper archival work as well - have all the games backed up militantly, so the games will never truly be "lost" (maybe do the playing on the duplicated copies, if cost-effective).
Charge $5 to $25 to come in and play the games all day. Run some special events, maybe have the Minibosses or the Protomen do a promotional concert every so often.
I actually saw something similar to this in an arcade in Nashville, TN. It was an arcade with a bunch of pinball on the left, older arcade games on the right. In the middle was a large screen tv and a smaller screen tv. They had older systems and a very large shelf of games. You could pay to play by the hour and get to use any of the games in the library.