If you have the sellers number give them a call and get their honest answer on the cars problems, if they are a half decent human being they might help (But don't hold your breath).

I doubt you would have any luck with Fair Trading etc, I think it is buyer beware when a private sale.

Is your car the one that was on the recent RS club North of the River cruise (I had the grey STI).

One option is to make a list of the problems and take it to Fats at Wangara, he knows the subies like the back of his hand, espicially the built cars.

Cheers