There is a large section of these on Ebay. I would not suspect you will see any of the newer machines (made from some of the old TV shows) for a little while, until they start leaving the casino.

I remember quite a few years ago going to an auction with a friend who was an avid pinball machine guy. They tried to auction off many slot machine fronts but no takers. I always thought when I buy a house with a basement gameroom I would purchase some and put them up. I agree they look quite attractive.