There are also 2 4th gens with the V6 lumps in. A '94 silver 3.4 going for £2k in Bolton and although the ad expired there is a black '99 3.8 in Kings Lynn for £3500 which I was tempted by myself.
£6K for the Z28 seems a bit expensive but I suppose if it's in good shape, low mileage etc. then it's a good price. Looks very nice and unmolested. Unlike a blue Z28 on there with some sort of stripes that aren't even parallel - very poor looking car claiming massive bhp with a new air filter and exhaust. Was up to £2k when I last looked. Hope it's nobodys' from here.