You usually can't go wrong if they have a full service history and receipts to prove it. I bought a 98' DC2 a few months back. I didn't even test drive it, the owner did and i fell in love with it and bought it on the spot. However, he did have full log book etc etc.

Although once again, keep your eyes peeled for unaligned panel's. I was able to identify that the gap between my rear bumper and the tail light was slightly gappier than usual. So i sussed that out completely with the previous owner. Just a heads up