2018 F 250 6.7L V8 Super Duty

Hello everyone - Company I work for provides trucks for management. I have an eye on diesels as I have a farm and I get to take this one home as long as I keep it clean and dent free.
This one has 240,000 for $15,000. Any insight on what to look for? It was a former fleet vehicle - mostly highway miles. Body and interior in excellent shape. Or should I run away. Its getting impossible to find diesels at dealers around here (only place shop will buy from).

Thanks in advance for any advice