I have been following those prices for quite a while since I am fascinated by that bike and as soon as I can I would buy one of them.
You would find an SP3 around £6000 and an SP4 around £6500 / £7000. More if the bike as exceptionally low mileage.
Somehow the experts tend to say that the SP3 is the one to go for. Engines are very similar but SP3 had the older frame and the aluminium tank. SP4 lost those. SP5 even lost the front ohlins fork.
Threaded Mode