I paid $5,000 for a trashed one that included new CPR PF (that needed to be installed) and all new PF plastics, posts, rubbers, etc.
Finished the restore about a month ago (everything except cabinet). Turned out perfect!
So I'm in for $6,000. I think that's a fair price, considering its rarity and how in demand it is.
It's a great game, beautiful with a solid set of rules and fun shots.
It's probably never leaving my collection.