It would be double that price now for such a nice example!
Thing is now, there are in my opinion only 2 types of Sapphire Cosworths left, rusty, poorly maintained shit boxes (as you call them) with deluded owners thinking they can still top money for them and very well looked after ones owned by enthusiasts who have spent lots of money on them to keep them in tip top condition. These are the ones that have gone up in value a lot and as there are fewer and fewer left now they will probably continue to fetch good money especially the 2wds.