It depends what you are looking for and what budget. I'm sure almost anyone on here would sell for the right amount.
So I picked up my 2010 cup for as standard £8400 with cam belt changed, 77k miles. I've spent £3000 modifying it so in essence its an £11,400 car. Your best bet is to keep an eye on eBay/pistonheads/autotrader for ones that come up and try and buy a bargain. Also consider the price of a LSD and a non cup chassis.
