Hey, great choice in cars!
My Driver has got 206k on the clock and its only just starting to smoke (tiny bit), its only the Valve stem seals worn which is quite common for high mile golfs. Easy enough to change though!
You will find that most parts for Mk2 Golfs are easy to come by and fairly cheap in comparisen to other cars.
If you have any questions at all feel free to ask, this lot at golfGTI.co.uk are a good bunch, and a lot of guys and gals here know their stuff.
Enjoy!