Thanks Ralph, that's what i wanted to know.
I thought it would be flat steel, and it's well within budget which leaves room for repairs and almost all the money needed for a Tdi conversion.
Having spoken to him on email, he seems pretty genuine and it's had the bits done over quite a while in line with regular servicing and maintenance.
There's almost enough in my budget for the necessary bits to put the Tdi in now, which would be nice.
I'll sleep on it.
Don't be suprised if you end up thinking things like "Oh Dunc, what have you done now?" in the near future though...