What do I look and listen for when buying a 6.7 F350 Diesel

200,000 km is about 124,000 miles. I would sooner have a newer truck with high mileage than an older model with low mileage for the same money. Running a truck down the highway all day causes very little wear if its not pulling heavy. 4 years ago we bought a 3 year old Peterbilt with nearly 1,300,000 km on it. We've run it for 4 years now and haven't spent a dime on repairs....it runs, drives and looks like new. We find our old equipment is much more likely to give trouble regardless of miles.