Highest mileage I ever had on a vehicle before selling it was 145k. Just bought my son a 1999 f250 Super Duty with the 7.3 PS from a friend that has 234k on it. He replaced the injectors and glow plugs about 7 months ago. So far, it drives fine and doesn't even leak a drop of oil.
Didn't really want to get him a diesel, but I knew the history of the truck. And, I traded a Browning Hi-Power and $500 cash for it
Hoping it will last him a few years or so.