Check it over carefully for panels and paint, J28 don't seem to give away many bargains!

On the log-book it may not say Escort Cosworth due to the late registration, may just say Escort 2 litre. As above you may have a very hard time selling it on as well. People paying 13-17k for such an old car are a funny breed and want things spot on

I think you may be able to knock them down a bit on price, as for a private sale it would struggle to sell for that much in my view.