I read either here, or on another forum that Ford estimated there were only 500 actually running around in total out of 8604. I guess we have to remember that the S1 went through the muppet ownership - lots written off, lots scrapped due to rust, lots stolen back in the day and now lots being broken for rare parts.
There seems to be 3-4 a week on ebay, maybe a couple in the Autotrader every week.
RSOC have a post listing registrations, they only have 147ish of B, C and D reg S1's that they can account for.....
Mine stands me at 5.6K (ouch!), but it's thoroughly mint, very minor jobs need doing and could have been left undone. Interior is totally perfect, wrong radio (but I'll address that). Carpets mint, dash mint, seats mint.
All welds are perfect, white behind wheels, kit perfect (no lumps out of it), hatchback perfect. It basically reminds me of a one year old car.
Only issues are - wrong airbox (although I have a mint new airbox now) - there was/is a K&N cone on it. Wrong exhaust - but a very nice stainless on it. Tiny amount of rust in sunroof - now treated but requires professional respray to that area. Wrong aerial - now corrected with original Ford part.
It came with every MOT, I spoke with the previous owner who was a company director, lots of service history, HPI clear (with previous HPI cert's as well as the one I did), original documents - accessory booklets, owners manuals etc etc, RS workshop guide etc etc.
I'm over the moon with it. It's the car I wanted back in '88, only it took me till now to find it!
I knew if I passed it up that the odds were against me finding another in this conditon, so I blew the money that I had taken on my mint MR2 GT Turbo for it. Makes me smile every time I open the garage door.
As my little 2 year old girl says - "I like that car......"