Welcome to the Forum from NH.
Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.
I hope that you will become a participating member in the Forum's discussions.
It is a sort of crapshoot when you buy a used vehicle. The outside of the truck certainly looks good from the one photo that you posted. One owner is good and available service records are a big plus. At 160,000 miles, your transmission will be getting long in the tooth, so you should plan on a transmission rebuild or replacement in the next 25,000 miles (but, it may never happen).
