When I first saw this thread title I chuckled a bit too as it does sound a bit crazy but let's step back one second here and put things in perspective:
Owners who can shell out $80k for a sports car most definitely can afford an extra $20k. Value is all about perception of "did we get a good deal" and also scarcity.
Now let's take a high demand car like the GTR and with people paying $25k OVER MSRP it's nothing new for low volume hot cars. Just look at the Audi R8 STILL commanding $30k over it's $120k rough MSRP price. Most dealers only have one per year but at least the car is still in production!
Back to the NSX - if say a potential buyer wanted a 2004/2005 late model NSX in good condition + correct color/mileage, etc, they could NOT order one or even wait till the next production car. They would HAVE TO BUY FROM THE USED COMMUNITY and at this point, if I really wanted a say 2004 white/onyx NSX, I would have to pay what the previous owner wanted
So if MSRP is $89k, the dealer asking $105k is a mere $16k over MSRP - that's really chump change for a exotic car that is NOT EVEN MADE ANYMORE! Of course whether the dealer would actually get that sum of money is a different story all together but they have every right to ask that amount. It's not ludicrous or crazy as some of you are claiming if you put things in perspective.
At one point the GT3 RS market was commanding $50k over MSRP FYI....
It makes me proud to own one of the rarest of rare NSX's and quite frankly, it would take a HUGE sum of money or gun-point for me to give up my NSX. Reason being is that there is really no other car I want on the market right now so if I do sell this NSX I have to think about how much I have to dish out for my next ride. If I had to write my own check for a car, I would not ever go over $150k unless I hit the lottery.
Heck this just makes late model NSX owners happy in that our cars will be worth more down the road than now.
rk