Here's the add from the Dodge dealer where I traded the Ford truck at.
They made a couple mistakes, it's only been the last 6 or 7 years that I didn't drive it in the winter. And it only sat in the garage for a week out of the last 12 years.
When asked if I chipped the 7.3 I told them no, they didnt ask if I used a downloader ,
They also didn't ask if the ball joints were good, or if I towed anything, ( the holes in the hitch were egg shaped) and did I think the tranny was ok. ( it needed Ball joints, and I was concerned with the tranny.
They also didnt ask if the gas pedal and the gauges ever quit working , I never figured this problem out, I installed a 10 amp circuit breaker in the fuse box. The day before I traded the truck I noticed the front axle seal had started to leak, they test drove the truck for 5 minutes , and ask if the 4 WD worked (yes it did, but the lockouts needed service) . They also told me the remote mirrors weren't working from inside the truck, I knew that.
Edit, this F350 served me well for the 12 years I drove it. IIRC I only put $300 in it the entire time, 2 U joints, a carrier bearing for the driveshaft, and a fan belt w/ idler pulley.