My 98 300TDi 110 County was just what i was looking for and has been fairly trouble free (touch wood), engine is simple to maintain and goes on forever. The downside of buying an older one is that you have more rusted out door bottoms, rear crossmembers, worn door hinges, steering and suspension etc. So in my opinion, if you're looking for one that you can work on yourself, mod and upgrade and don't mind driving a noisy old truck, go for a late 300TDi. But if you want more refinement, a smoother quieter engine and the suspension, steering etc to be a bit tighter go for the latest TDi you can afford. Good luck.