An eloquent response Squirrel, but dudah has an open mind (judging by the query) so perhaps some encouragement is called for. I would suggest: go to the Pinball Internet Machine Database and read comments on various machines from different em eras. Gradually, you will gain some understanding of features and gameplay that appeal to owners. In some respects they are more difficult to fix than modern machines, in some ways they are easier. Maybe make a shortlist of a dozen games (single player - lighter, less to fix) and splash out on one when the opportunity arises. Don't ignore titles not on your list - if they don't get lots of 'negative' comment on the Database, might well be worth considering. Worst case - you get one, fix it if necessary, still don't "get it" - sell it.