Just like anything else in life...it all depends on how it has been treated by the PO. But first you should realize that a diesel truck is best used for accumulating a lot of miles in steady use and 190,000 miles in 13 years is only 14,610 miles per year and that is not good for it. Now maybe this was owned by a snowbird that used it to pull a 5th wheel to AZ or FL and then parked it for 6 months at a time and that might be all right...but not if they used it as a daily driver for a 5 day a week 10 mile commute BTW most Cummins will run 300K to 500K before overhauls with regular (expensive) maintenance.

Why do you need a diesel? They are more expensive to purchase and maintain than a gas rig, but make up for it in longevity and brute strength. But there is no reason to own a locomotive just to make trips to the local 7/11