Firtly in my opinion the '95 HRC colours SP in not that collectable. Just didn't like it (although I did have one). I think the best was the Rothmans one, followed by a '96 Repsol because that was the last year Honda released an SP version of the NSR.
Seeing as someone paid 4.6K for a frankenbike the other day on eBay, who's to say what true SP is worth. I'd buy a mint standard one for 3.5K any day of the week......of course assuming I had the money, which I don't.