Very true Brian. My immediate thought was that it was a 'collector', put away new, and not driven (much) but like you say: if it was raced, that mileage might be considered high (if it's the original engine which should also be determined
)
To my mind the asking price is high enough on any of these babies to warrant a complete check from stem to stern by a good
corvette mechanic. That way you're reasonably assured of a decent car or one which you know needs some repairs and well worth the couple hours labour. (of course Manny would be my choice)
The owner shouldn't be shy about supplying any history of the car too.
If he says it's good, he should be prepared to tell all about previous owners if any and the car's 'baggage'. I'd be concerned too about proper storage. Moisture can make a heck of a mess with electronics (and mechanicals for that matter).
If it proves itself and is buyable, then work out a fair price based on market value and condition/mileage/mechanic's report.
Good luck with the sale. Hope it works out for you -- if it does, can't wait to see it. Sounds like a beauty.
From what you say, it's a gem.
Colin