I disagree with that I'm afraid, it was everything the XR3i wasn't i.e. Quick, well handling and a very successful racer in it's class.
First front wheel drive car with a limited slip diff not to mention it practically started the chip tuning industry by itself!
Ruined and killed off ultimately by being so easy to steal and practically uninsurable by it's end but still IMO it was a very good car for it's day.
I had two, an S1 and S2 both of which got stolen!
I very much liked them and actually preferred the S2 to drive but the S1 looked better and got far more (maybe too much!) attention.
That said, I wouldn't want one today even with deep pockets, the game has moved on big time and the last one I drove was a great way to ruin old memories!! (I've found this with a lot of cars I loved when younger and subsequently driven years later!)
In it's day it was a blast, today I can think of many more equally classic cars I'd like for £20k over an S1 Turbo.
I'm sure that £20k example will find a willing buyer, probably not at asking but not far off I'm sure. As said, it won't be bought by somebody thinking what else £20k would bag him, it'll be bought by an enthusiastic collector.