After looking through the last few pages of for sale posts it looks like cars are not selling as quickly as they were last year.
Also, just a quick look through the last year or more of ebay threads makes it seem like cars are not selling (unsold) and there are many, many relistings for the same cars. Now...maybe they are getting sold outside of ebay...who knows.
However, looking through a lot of Porsche-related forum for sale posts, I have noticed (anecdotally) a larger percentage of cars getting sold. I wonder if all of the media hype for the NSX collect-ability, the somewhat majority disappointment in the new NSX, and the hot collector car market in general are fueling higher listing prices...yet without the timely sales expected? After all, with Porsche we do know for a fact that all non-GT models are going turbo very soon and that could be driving the NA Porsche market.
As someone who has kept very close to the sales on the market, I would say you are comparing different markets. I would also say that the NSX market is every bit as robust today as it has been for the past 18 months that I've been watching it. Any car priced reasonably sells VERY quickly. Look at the Kaiser one that was listed last week @ $49K. That car was effectively "sold" in less than 6 hours and had it been priced at $52k, it would have sold just as fast IMO. There are A LOT of people out there hunting for unmolested NSXs. Part of the issue right now is that our generation of cars (993's etc) are turning over into collectors hands. You find me an unmolested NSX in half decent shape and I'll show you a car that will sell in under 48 hours if priced even somewhat reasonably.
Here's my easy guide for selling in this market.
Assumptions are as follows:
Car is stock to mostly stock (bolt-ons only and orig. parts are included)
Miles of 50k plus or minus 10K
Paint in 7+/10 condition
No STRUCTURAL/FRAME damage (oddly, anything cosmetics ie respray bumpers etc don't seem to affect value much at all)
All maintenance verifiable and up to date
If those GENERAL parameters check out, here's where your car will sell in TODAY'S market
1991 - $43K- $46K
1992-94 - $42K-$45K
1995-96 - $44K-$46K
1997-1999 - $49K-$53K (bump for bigger engine currently very apparent)
Zanardis - I have not seen a transaction in the past 18 months, but if I were forced to take a stab, I would guess you are either side of six figures
2000-2001 - $51K-$54K
NA2 Coupes - Not many out there, but I would say a $5K+ premium currently (only 2 observable transactions over the past 18 months) And yes, I'm doing my best to keep my own bias out of the analysis.
2002+ - $60K-$65K (this market is a bit all over the place due to both newness in age, low volume production and milage ranges being generally lowers) My confidence in my pricing here is admittedly lower.
**EDIT: Auto trans get a $3K/$5K discount across the board
Ebay has been a terrible proxy for a number of reasons as well. The asking pricing are generally out of whack with real-world transactions. The quality and history on the cars listed have been dodgy and questionable. Again, generally speaking. Another difference is the sheer number of NSXs out there vs the 993 market. There are simply fewer NSXs for sale at any given time.
That being said, the NSX still faces the same bias as it did in the 90's. Many people will go for the Porsche/Ferrari because the brand desirability is just that much stronger despite any rational argument we can make. You don't need to explain to anyone in the world what a Ferrari is. Outside of the auto enthusiast community, you'll have to explain the what and why for the NSX. Eventually, I'd like to believe that the awareness of why the NSX is an historically important milestone in the evolution and influence of all future sports cars and it will get it's due.
Really hope this is helpful to guys out there looking to buy or sell. I believe that having cars actually transact is much healthier for our market than just having ever increasing asking prices on cars that don't move. It just discourages people. And, as always, happy to chat off the boards with anyone looking for more granular details on a car they are looking @ to buy or sell.