what are these worth?

stumbled across this sierra a few days ago. left a note on the windscreen and got a call back.
the bloke apparantly has 2 four doors he is selling. taking motor and trans out of both and selling as rolling shells. this one appeared to have a pinto fitted looking thru the missing bonnet vent.
im just after a ball park figure on what a 4 door is worth minus motor and trans. body and interior seemed to be in fair condition. only had a quick look though
ive always like these sierras.




cheers