It's somewhat unfortunate (from a game collector's point of view) that so many classic video-game cabinets should end up in the possession of a famous person, much less one of the greatest pop legends ever known to the United States.
Especially one that recently passed away.
Some rare items can be incredibly difficult for collectors to find, and even more difficult to obtain for a reasonable price. Not everybody has deep pockets, and it sucks when the added value of "Jacko owned this" is tacked onto the price tag. Chances are that so much cash will be thrown at so many things simply for the "piece of MJ" celebrity factor, far removed from the qualities or personality of the game itself.
With any luck, some serious collectors will manage to get a hand on some of the memorabilia that Michael managed to stash away over the years. Fortunately, it doesn't seem like he kept the rarest of the rare away from the public eye, so my posterity-bone need not worry itself over some forgotten classic winding up in the show room of a well-to-do that doesn't really give a damn.
In the meantime, those of us with lesser aspirations in cabinet collecting can amuse ourselves by checking out this nifty virtual tour
of MJ's funtime belongings. Personally, I'd love to get my hands on Terminator 2: Judgment Day and Lethal Enforcers.