Hi Steve, welcome to the board! Mine's a bucket of guiness please....
If it's been unused for two years you'll definitely want to change the belts (possibly before starting it up. although it should be ok). I'd also look at changing the tyres, chain (unless it was greased), etc.
There may be a couple of seals on their way out (output shaft seal), especially those that have been out of contact with oil for a while. Worn swingarm shims can have a dire effect on handling, as can head bearings.
Sounds like a bargain, you can do an awful lot to a 900 for a few hundred quid. A US company does full stainless bolt kits for about £30, a single seat (SL style) from Ricambi Weiss in germany is about £50, High level termis or Sils c.£200, carb-warming kit (standard on later models) £70, tinted screen £45, etc, etc. All of a sudden you've spent £5k on an SS, but it's money well spent!
Have fun and lets see some pics when you get back.
Cheers,
Ali