I paid $1,700 for my 1965 CC Preview bowler about 2 years ago. It was 100% working but a cosmetic mess.
https://pinside.com/pinball/forum/topic/1965-cc-preview-ball-bowler-restoration
This one looks a bit nicer than mine, so I would estimate $2,000-$2,400? Of course, other factors will also drive the price - location, motivation of seller, etc. Good luck.
I wouldn't sell mine for less than $4,500 - of course i am biased, as i spend 100+ hours cleaning it up...