Yeah mate it's deffo not just you, I recently bought a plum aswell, I had to cough up about £675 on the car

Had the timing belt, waterpump, tensioner, the Cat, rear disks and pads, service, and some other stuff.
I coughed up the expenses as I wanted to keep the car for some time, then my brother decides to sell his golf GT TDi 130 with some extra goodies so i sold the Golf I had just done work on, to get my brothers as he had really looked after the car and the clutch and flywheel had been replaced £800 jobbie.
Also the other thing is that the fooker that sold me the previous car had it advertised as a GT TDi 130 PD, the sticker in the boot tied up with being a 130 but when I got it insured the next day it turned out to be an SE



My local VW specialist also confirmed this for me and the guy who I bought it off wouldn't do fook all for me and wouldn't take the car back

Just be carefull mate, also i'm sure my fiasco isn't that common but just thought i'd give you the heads up of a possible scenario.