Personally not a fan of the NSX, it's close but just misses out in the final analysis. Saying that VTEC engines are superb
NSX have risen a lot in recent years and as with all cars they are worth what people are prepared to pay. As commented this is an Auto so less desirable ultimately but people will pay this sort of price today. The classic market will continue to move as long as people are prepared to pay and ti appears at the moment they are.
750-101 Alfas are now all £30k plus
105s have moved to the £15-20k mark, more for some models
Even 116 cars are now £10k plus for good ones