I'll share my experience, from about 4 years ago, purchasing a rig a few thousand miles away...
Needed a truck after selling my only car at the time - had a deal lined up locally but the seller's family made him back out since they wanted to keep the C1500 in their family...
Anyhow, not being able to find anything locally and within a reasonable price tag, I explore my options and came across an OBS in Alabama. In short, called a local shop that had great google reviews, asked if they did pre-sale inspections and informed the seller to take it in. Received great marks with the exception of needing ball joints soon.
Got seller information such as his ID, bill of sale (title needed to ship with truck) and purchased via PayPal, aligned shipping and a week later it was in my driveway located in the PNW.
Would I go the exact same route next time? Hmmm mostly - due to PayPal only being able to protect the buyer up to 5k...
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20210428_143437 by
Sergio Zapien, on Flickr