I'd also say the ONLY value in a standard 3 dr shell is to re-shell into a cossie.
Ranj off here was selling a proper rough looking 3dr rep for £1000 yet I'd say without the cossie bits it was scrap value,I'm sure someone bought it and was very happy with it as it was a fair price but if you have the base car to start from your over 1/2 way there.