The updated MPU possibly indicates some diagnostic work has been attempted. I would guess it needs connectors repinned and the rectifier board near the transformer replaced--neither of which is a huge cost beyond the time it takes. I'd rather have Cheetah than some fairly common game like Cyclone, but I wouldn't want it more than what 5-6k would buy, but I'd say the same of Quicksilver and Star Gazer without ever having played those two. It's a fun game with a lot to shoot for and difficult enough that you aren't running through the entire game every time you play it.

Hey no problem!