Great example! After red the white ones look good.
All affordable classics are appreciating, things that were £500 smokers 10 years ago are obviously becoming less common sights. Personally I think they have an upper ceiling and prices will plateau in a few years but I'd love a red 90 spec.
Thing with these I'd guess is that being less desirable against the escort they tend to have avoided being abused so much and those holy grail low mileage, one owner cars crop up still.

That plate must carry some value too.