Well here are the results:
https://bhauction.com/en/auction/tok...nda-nsx-type-r
https://bhauction.com/en/auction/tok...B4-honda-nsx-r
The NA1/92 R sold for 30.8m yen = £223k = about £300k after taxes and shipping
The NA2/ 02 R sold for 48.4m yen = £350k = about £465k after taxes and shipping