If you're interested in learning how to repair these things, I'd start with Clay's guide at http://www.pinrepair.com/em/index1.htm
That thing is pretty much the bible of EM repair and was invaluable when I was first starting out. Heck I just used it this evening to figure out I was missing a switch part.
I encourage you to give fixing it a try. The nice things about EM machines, at least from my experience, is there's usually very little that can be screwed up to the point of being un-repairable. Also if you only buy/replace what you absolutely need to, you won't have to spend a lot of parts. Once you get your feet wet you might find fixing them to be more fun then playing them :p