I think his sales pitch/write-up is a little over the top. It is my view the car does not have very low miles and unlikely to have been pampered and garaged. Although, Sun Valley is an area on the east most side of the San Fernando Valley, LA. Its typically a smoggy, dusty and windy area (general characterization). Wonder if he has had the TB/WP service done, says he has major service records, missed the ball by not listing if the TB/WP was done. The interior to me is not like new, could use a detailing...in fact seller would have been wise to have had the whole car detailed. I put little if any weight in his comments about KBB value. Got too many questions still to say if his asking price is realistic, but probably not. I did a VIN search on this site and nothing shows up.
So in the end, I'd give him a call, get more details on service records, TB/WP, coolant hoses, window fix it thingies (would be interesting if he even knows about that), AC works at all settings, which dealer, they got a certified NSX mechanic. And if by some miracle everything works out, its only a 350 mile drive for you to view the car, which is a must along with a PPI. Good luck in your search for a car.
