I paid £3,000 for a '96 Repsol MC28SP last year. And this was for a low mileage (7,000 miles), mint bike in original condition with lots of paperwork/history, all manuals/handbooks (albeit in Japanese), spare unused card key still wrapped.....ie. very well looked after original machine, and not a restoration, just well preserved. It was even brought into the country brand new and I have the original receipt for the bike. I reckon this makes it quite a unique find and in a few years it might be worth more.

I've not seen any NSR's sell for much more than this so this is probably around the top guide price for a MC28SP in the UK, and an MC21SP is an earlier model so the guide price should be a bit lower.