Any motorcycle put into storage that long and left sitting is going to need a bunch of maintenance. Tires are shot, belt is probably on its way out. Fuel tank will need to be flushed and cleaned out. Fuel pump is probably bad...if not its likely on its way out, especially if there was any gas or moisture in the tank. Injectors probably need cleaned out. Battery is shot of course. Hopefully it was stored properly in a dry area, or you may have corrosion on the top end if moisture got inside the cylinders through a open valve. Should I continue?
Tires : $400-500
Belt $175
Fuel pump $200 (lunatic fringe kit)
Battery $100+
Replace all fluids $50-$100
This is just going to be to get you started... there may be more. I wouldn't fire the motor until you have a chance to "ease it in" by lubricating the top end and gently rolling it in gear with the spark plugs out. Once you start it, you could have a rod knock or something else that would explain why someone bought a $10,000 motorcycle and just parked it after 1000 miles.
All I can say is the purchase price better be cheap, because if you start it before going through it, you could cause some serious damage. At this point, I'd consider it a non-running bike.
There was a wheel bearing service bulletin that some Canadian guy can tell you about. Scott with 2 T's if I remember correctly. And the 2003 uses a one year only belt that was replaced with a stronger one in 2004.