Damn, I can't believe this is still available. I bought an 06 about a month or two before this was posted, to go back to the track after about 8 years off. The GSXR-750 is easily the most user friendly bike I've ridden to hustle around a race track. A bit more power than a 600, so it's not absolutely imperative that you ream the piss out of it everywhere, and yet still fantastic cornering and very forgiving.
I bought the 06 for $4k with no spares, no ohlins, no brembo master cylinder. Ugh....This is a steal. Especially since it's a 2011, that's the cutoff year. 2011 and up are the years they still make everything for, like front fork cartridges...I almost want to buy this one and take my chances selling the 06 for whatever I can get...