For those that want an all-original clean ultra low-mileage NSX, even if the engine needed a rebuild, it might still be worth it.
Ever price out what it costs to put in a new interior? The leather panels, console plastics, dash, side panels, carpet, etc., will run you over $15,000, assuming 25% discount off list prices from one of the discount parts vendors. I'm pretty sure you can get an engine rebuilt for a lot less. If I'm not mistaken, I think $15000 might even be approaching the price for a new engine, again, assuming 25% discount off list.
So, assuming you were able to buy this car for say $37,000, put another say $5000 into an engine rebuild, it's still cheaper than buying a normal mileage '91 or '92 and trying to recondition/restore the interior & other stuff to "new" using OEM parts, and I don't think you can get a clean later model with similar mileage for that price either.