Thanks for the replies everybody.

I've been to the owner, the bike hasn't moved for 6 years, but was stowed away in a dry and warm garage. The owner bought a new battery around the time he quit riding it, which was also stored away safely and is now charged again. The bike hasn't had any technical problems, and is in general good shape apparently. The clutch is old and a bit hard to handle sometimes. Engine performance is excellent, according to the owner, and he told me i won't have a hard time kicking it back to life (he says putting the battery back in, changing the oil and coolant will make it start and purr like a kitty in a couple of minutes).

@lmhobbs: i understand your point, i'm going to check up on that. Normally anything above 125 requires the license here as well, but you can drive your own car as well when you're getting the license so who knows... But i'm not planning on driving the bike yet anyway. The owner is a friend who simply wants to get rid of the bike, either to me for 300 or to someone else for a regular price, since it should be working just fine. The reason i'm buying it is simply to have something ready when i get the license (which in belgium schools they help you achieve with 400's anyway.) Given the fact that he's a friend and wouldn't screw me over, he told me that should the bike be serious malfunctioning i would get refund, and my limited budget, this seemed like an opportunity i couldn't leave passing... plus i love the model!

My current plan is to move it to a good storage place for the time being and either learn how to do the basic mechanics myself, or befriend a mechanic somewhere and give it to him for a quick maintenance by the time i get the license, so i can start driving by next spring.