Autonerd
Member
Gut feeling is to turn it down, and keep looking. But that is based on my experience with a 500C + 80mm (much older). So, people with experience, what would you do? Would you be worried buying Hasselblad gear that is 20 years old and which haven't been used for the last seven years?
Can't speak to the 'Blad, but I have bought several cameras that were much older than 20 years and had spent years idle (my own Pentax KX fell into that category). Few issues provided batteries weren't left in and the camera wasn't exposed to extreme heat/cold.
And would I pull the trigger? No -- I'd get a Mamiya and spend the change on an airplane ticket to someplace exotic where I could take photos with it.

Aaron