The best thing you can do is be careful about who you buy from and what you are actually buying. Buying from people who originally bought the game or have had it for most of its life will generally have equipment that has been taken care of. Buying off of an arcade that is going out of business or from a company that rents out and sells arcades will usually land you with an abused machine that was not well taken care of. If you are buying sight unseen make sure you work up some sort of agreement stating the what you expect from the machine (completely working display, not offcenter, all buttons working and responsive, etc...) so you don't get screwed after you have already paid for something. Basically it depends on how picky you are if you want all original games etc... I have a few that I was very picky about buying (original cabinets and hardware, current versions of the game, etc...) They are big hits at parties, but I still play them for nostalgia sometimes and they both still work great. I have never had any problems with mine at all, but if something ever breaks there are usually spare parts on ebay, or you could try and find a place that repairs them in your area. Here's a pic of two of mine, I'm still setting up the gameroom in my brand new house so I haven't decided exactly where I want to put them.
Envy...:smile:
. Pics here 
