Update.
I've spoken to the bloke and to be honest i'm not convinced that everything is as it should be.
i asked him to describe the car and he just said the same as the ebay advert but when i asked him about the parts he had described (T4 turbo, uprated clutch/head gasket etc) he didn't know anything about them, he couldn't tell me when thy were fitted, who by and couldn't answer , what i considered, to be easy questions.
Why would you remove the carpet to save weight??
I think that with 4 holes in the roof the inside has got wet, hence no back seat or carpet.
I think i'll steer clear of this one.
The search continues.....