Good idea to read up on the snap ring issue, later 91's I believe and early 92's. 5 spd MT are only affected.
The VIN on the transmission will tell...
But as you will read... a car in snap ring range shouldn't be a deal breaker. More something that should be accounted for in the price. Some in the range will be fine, some won't. Kind of like Russian Roulette.
I happen to have one... but not for sale. I was told it was fixed, but have no paper work to prove it. I plan to have it checked out the next time I have some of the major work done on it... I do have an issue on where to take it for that, since the local Acura dealer is clueless about the issue. Which tells me they don't know much about the NSX.
Good luck in your search... AC Cobra's are nice looking cars... the originals are out of most of our buget ranges... I kicked around getting a replica for a while, but decided to save up and purchase a hand made vehicle made by the top craftsmen at Honda.
I'm sure you have seen the red one listed under the Craigs List thread. That is a nice car, but at a premium for the very low miles (5k miles). I don't believe it says if it is in the snap ring range or not.
You will be able to find a nice one. Be patient.
Some of it is subjective, but IMO they are beatiful cars. They have a timeless design.
I had mine out yesterday, stopped in to fill it up and had some guys ask if it was okay to take pictures of it. I don't have a problem with that... it blesses them. I didn't tell them it was an 18 yr old car. I have told others and they are blown away, they think it is brand new.
So if you don't like drawing attention, an NSX is not the car for you. I'm fine either way. I realize when I'm in the NSX there will be gawkers and it is the car they are crazy over and not me.
There are lots of knowledgable people here on prime. Ask any question, and you will get good answers.
Good luck in the hunt....
Rod