I have one.
There were only 560 built. The 1990 Nismo can be identified because it has not rear wiper, no ABS. Vin Numbers start BNR32100001 to BNR 32100560
They have Nismo adjustable dampers and the speedo has NISMO written on it.
They have metal turbine blades not ceramic.
I can send you more info if you need it.
If its in good condition $25,000.00 would be a bargain.
Their value will only go through the roof. A good investment.
Cheers
Bov