mmm, im not too hot on that mark of Escort, but i've seen the arches go on some so check those. i doubt it will be rusting underneath yet so you'll be ok there, but check anyway.

its mainly the panel gaps that u need to check for. also make sure u HPI it.

And after u have taken it for a drive, leave the engine running and watch the temp gauge, dont want to buy it to find the head gasket has gone.

im not sure what to look for on the engines though sorry