Williams 3 long term mot failure, what's it worth??

Hi guys, I originally posted about my car 8 years ago and still have it stuck in my garage!

http://williamsclio.co.uk/forum/show...ming-to-an-end

I have been contacted by a friend of a friend with regards buying it for potential restoration but I have no idea what it's worth now. It needs a lot of work doing to it mainly due to rust but I obviously don't want to just give it away at a knock down price knowing how prices of Williams cars have increased and the value of parts if it was to be broken.

What do you all think would be a fair price??

Thanks

any pics

current pics would help alot.. could then decide whether its worth restoring or breaking...

There are a couple of pics in my original thread but I'll try and take more over the weekend if I can get enough access in my garage.
I guess it really depends on how bad the rust is that isn't visible and how much you're prepared to invest in the restoration as to whether it's worth it or not.
What do non restorable complete cars go for? Really don't have the time or space to break the car myself.

id be interested ....maybe for spares