In px rule of thumb I value cars that are hpi registered as previous damaged at 1/3rd less than they should be , thats on tintops, It will be less on a westy and certainly less on a trackcar. I would hazard a guess that the car had it been undamaged would be worth around £8-£8500 tops on that year , I think it would need a decent box to be worth above that, so with a bit of adverse history to the car that a fair valuation would lie somewhere between £7 and £7500 at the top, condition dependant , in the same breath there isnt a lot of 200bhp track spec cars floating around at the moment so you would maybe catch someone at a higher price that isnt bothered, to be fair some cars have very little damage but due to labour costs are written off, I know as Ive had westys previous and had them back on the road in half a day ! the lower valuation comes as sometimes insurance companies wont cover previous damaged cars and if you ever have a claim they will pay out less.