Should get a tidy one for £4k or possibly a restored one.

Think there was offical 1 black one, which was done for Dianna.

You will clearly see the dashboard cracks beside the windscreen back towards the cabin - it is where the sun has dried the plastic.

Being a ford look for rust around the battery tray, arches, sills, but also more problematic where structurally a nightmare i.e. chassis rails, etc.

Engines, turbos, and transmission are the next thing to look for. Too much too list really but look here for loads more info http://www.rs-ford.co.uk/buyers-guide-escortrsturbo.htm