For sale is one from my personal collection. I purchased this Mamiya M645 1000s (Serial: L80692) and used it for numerous rolls but I had some alignment issues. After getting a diagnosis from a reputable Portland camera repair shop, I'm told these are the issues:
Seals and shock pads are gone
Curtains are very dry
No 1/1000 speed and the remaining speeds are off
Only works in 0 Mode
This camera did/does work so it's certainly not a lost cause. I believe the shop was being as detailed and thorough as they could be to bring this back to a like new condition. The camera is sitting on a very solid foundation and if you have the repair ability or want one to CLA to be in like new shape afterward, this is the camera for you.
Overall, it is a beautiful camera and you certainly won't be disappointed with its physical condition.
I have updated the description a bit to provide some more information and context. I think people get scared away by "for parts or repair" cameras when they shouldn't. Some just need a little love to get them in the right place and this one is ripe for a total overhaul since it is in such wonderful condition.