I'm out of room too and now have some on location (which has helped) but yet others folded up and in storage right now. I really need to start to sell some. Last game I sold was probably 4 or 5 years ago (Jolly Park) but I need to start thinning them down.
Out of all my games, all of them work 100%. Had BSD go down new years eve and ended up being that BR4 had shorted, but that's been replaced. ACDC had a couple broken wires. One for a flashlamp and another for a pop bumper light, but that's been fixed. A couple other games have a quirky score-reel or some other small switch not always working annoyance, but nothing major.
Not many games were ones "I had to have" and bought non-working. Most were games of opportunity, in that, they were for sale but I wasn't really looking for that game in particular. Probably why I ended up with quite a few repeat games.
Hey, it's a hobby and do it at your own pace. Fix what you can, when you can, and enjoy the ones that do work.