there are tons of old pinballs out there for sale. there is a whole cottage industry devoted to them, as well as the newer electronic ones. i had four at one time, and still have two. I'll help you find a website for pinball classifieds if you like (i'll have to do some searching for the url, but shouldnt be a problem.
Hi - I'm looking for an old pinball machine, too - could you ping me when you find that URL? Thanks!