Many thanks for your reply everyone, I have spoken to the seller, and he said that the supercharger has never been serviced to his knowledge. There has been 3 previous owners, and he said the car has done about 12000 miles in the last 8 years by the previous owner, and only about 3000 miles by the seller. He is selling as he now has 4 cars, and cannot afford to keep them all. The service book has stamps by VW, but not for the past 9 years, as the owner has always serviced the car himself. (Not many receipts). He understands that the car will need a supercharger service/ rebuild, so he has knocked off £500.
It has 4 good tyres, 2 x original keys, power steering, No AC,
The bodywork..... he said it is in very good condition, with no, or very little rust. He took it up the ramp a few moths ago, and didn't see rust, and said it looked very solid. The MOT guy apparently said the same thing. No rust on the fuel cap area etc.
He said it drives very tight, and pulls very well. No modifications done to the car.
NOW THE BIG QUESTION.
What do you guys think? Your the pro's.
Shall I go to view the car? (12 Hour drive).
Shall I ask him for specific pictures?
Should I be worried about the car Clonking out before it reaches my house? ( No supercharger service etc, and no recent stamps in the VAG book.

Once again, opinions please....
Thanks again everyone