check oil color (good indication of maintenance)
Check trans fluid color (good indication of tranny life)
Keep an eye out for extensive non-factory wires under the hood, under the dash, and under the body. (good indication of crappy shade tree mechanic crap)
a 97 with only 82k is very low mileage... Almost suspiciously low. I would look at the screws that hold the dash panels in for evidence that they have been removed (wondering if the gauges have been replaced). On that same note, look for extensive interior wear.
Another obvious is get underneath and look for rust, evidence of major drips, etc.
hopefully the truck will be cold when you get there. Start it cold and listen carefully for engine rattles that go away quickly as it warms up (timing chain issues). I know when I sell cars I always warm them up before the person gets there for exactly this reason.