I've read with interest the dynamic regarding NSX values on this site. It seems as though there is a group of us that want to try and push the value of our cars down or for them at least to stay the same. I don't know why that is given the current economic climate. Perhaps it is those that would prefer a better one - or don't yet have one - and see them slipping out of reach.
Again, I don't understand some statements that only certain NSX are worth having - for driving or investment. They are all rare, particularly in Europe, so, in the eye of the punter all are worth having. The fact is that, even during its production, the NSX was seen as quite special and very different from its other Japanese (300GT/300ZX) competitors even though sometimes it was lumped in with them. Now that nearly 10 years has passed since production ended, people (including investors) are getting wise to the fact that the car is going to be a sure fire A1 classic and that they "need to buy" now as there aren't many good R/H European ones around and that this will get less over time. This why prices are going up - it is now becoming a collector's car - like it or not. This applies to all NSX not just Type-R (not really available here), Type-S (ditto) and facelift models. Moreover, I would argue - having owned both types - that there is no real difference between 3.0 and 3.2 litre pop ups, although I would concede that having a NA2 is, overall, a better investment proposition as there are fewer of them.
So, my argument is that all NSX values are only going to go steadily up, with - over time - the key criteria for investment purposes being condition, condition, condition, coupled with a bit of provenance. That said, there will be a (sometimes big) differential between certain types (ie the last facelifts and Type-R) but all will be expensive - just some more than others. However, some won't be. Those that are in bad shape (overall condition or badly repaired) will continue to limp along at £10,000-15,000 as they are too uneconomical to restore and there are better ones to buy taking into account the cost of restoration. Hence, until we get to DB4/DB5 prices (which we won't), they will end up being scrapped for parts - where they are worth more. Similarly, autos will be slightly less loved but good ones will continue to make good money.
Even though I would prefer that my red/black NA1 manual coupe (the universal NSX?) was a different colour combination to differentiate it a little when we are all together, otherwise, I am very happy to have bought when I did and that there is 10,000 mile looking-like-new NSX in the garage. I say looking-like-new as it is going to Kaz soon for a full refresh (even though the engine has never had the covers off) and he may tell me that it's a pile of poo. However, I hope not and, if he does say that it's fab, then that will help to quell the myth that garage queens are worse buys than daily drivers! On the other hand, perhaps it will. Moreover, I'm glad that I wasn't tempted by a Boxster in 1997 (when I bought my first NSX) as that would be worth precisely zilch.