I don't know your age, but since you're looking for an EM, maybe you remember a particular title or two that you once enjoyed on location. Just about every title you can think of is available somewhere. Also, depending on how much you want to spend, you may be able to find a completely shopped and working machine locally on Craigslist or other online markets. I have a totally shopped and working single player Gottlieb wedgehead on CL now, but it's tentatively sold.
The good news is, there's a lot of games out there for sale, from totally shopped and working, to major projects. I don't know your level of repair aptitude, but if you can wield a screwdriver, and have a reasonable understanding of basic electricity, you can pretty easily find project machines; some needing only basic cleaning, new rubber rings, and a new ball, and some needing a bit more. Do some online research first.
Hang out here for a while and see if there is a title or two that rings your bell (pun not intended). What's your general location?