The more common the car, the easier it is to come up with a fair market price, because there are lots of sales of similar cars to compare it with. For example, I can tell you within $2-3K what a fair price would be for a given 5-speed '91 with 75K miles - fair price meaning you could buy or sell cars at that price all day long.
A '95 NSX-T with 7K miles is already very rare, due to its low mileage. One with an automatic transmission is even more so.
The problem with a rare car is that there is no vast number of similar cars with which to compare it. As a result, the spread of possible prices can be very wide. And that spread can be even wider, depending on whether you are a buyer or a seller, and how urgent you are. What I mean is, if you are looking to buy a rare car, you may have to pay more, because they are harder to find. If you are looking to sell a rare car, you may have to sell for less, because buyers are hard to find. And even more so if you want to complete such a transaction within a very short time frame.
The Pricing section of the FAQ is a pretty good guide, but you have to apply some judgment to it. If the car hasn't had its timing belt and water pump changed, and/or if it hasn't had fluid changes every two years, then there's some question about its condition; even though the mileage would put it in the A category, the maintenance would put it in the C category. Similarly, you have to decide whether you think the price should be less, or more, with an automatic than with a manual.
