Check for RUST, RUST and MORE RUST, there isnt that many places that MK4/S2 shells dont rot, unless u have found a good one, its very widely posted about MK4 escort rotting places so go to the ROSC site and do a search
http://bbs.rsownersclub.co.uk/forumdisplay.php?f=173
the RS kit can hide real nightmares and so can the sunroof ..........so do your research well, many people think they have a mint car on thier hands until they get the car home and delve a little deeper, check PAPERWORK and all the legal stuff, make sure it is an RS, the ROC guys know there stuff so id be keeping a very close eye on their forum!!!!!