I sold my Who Dunnit years ago. Never clicked for me.
But my good buddy was gagging for one, so I’ve been looking for him for ages. Over a year.
Finally got a really sweet one from TeeKee (listed on Pinside) for $3000 last month. It’s 9/10.
Very rare to find one with no wear around the weapons inserts (the little dagger etc)
As others have stated, that centre ramp is often broken and never available.
If the one you’re looking at has a mint playfield, and a good centre ramp, it’s probably worth close to what he’s asking, IMO. It’s no big deal to replace cabinet decals ... a lot easier (and cheaper) than doing a playfield!
My 10c
rd