I just bought not only my first 7.3, but first Ford. Specs are: 1999 F 350, 7.3L Turbo Diesel, Dually, Crew Cab, Automatic, 4x2, 88,000 miles (yes, that is 88K!). 14 years old averaging around 7K/year. It cost me $8,000. We just had a service check and only had to replace a rear pinion seal...