I generally hate slots and really hate video slots. But the monopoly ones just had some really unique technology.
If you read the link, it seems that Williams leasing is an anomaly. Most of the time casinos buy their slots and do what ever with them when they are washed up...destroy, trade in, sell, stick in an Indiana Jones-like warehouse.
I know that if I had a couple of those in my basement, I could install a stripper pole at the other end and the wife and other women would never realize it was there.