I sold my 1993 'Burb last year with about 250K on it. It was an excellent vehicle, very durable, reliable, easy to fix and never let me down. That said, I am pretty mechanically adept and kept it properly maintained. Mine was also relatively rust free and still had a very solid body and chassis when I sold it(although when I sold it, some rust was starting around the rear fenders). If this truck is not excessively rotten, and it checks out mechanically, I'd by it in a heartbeat. Even if it needs some brake or front end work, these trucks are easy and cheap to fix (if you can do the work your self).
The old GMT400 'Burbs aren't much different than the pickups. Sure they tend to have more power accessories, but nothing too crazy in the 90's. My Suburban was loaded, and all the power windows, seats, mirrors even the "auto reverse" tape deck all worked fine when I sold it. And nothing failed during my ownership. The only thing is the A/C can be a pain if it has front and rear air. Keeping that system leak free can be difficult when they get old. You can always cap off the rear and just run front air (but the rear passengers will sweat). I had rear heat and other than a flush to the core and a minor leak (repaired for less than $10) it never gave any issues. Mine was used for hauling stuff more than people. With the flat 8' load floor it was great for plywood and drywall.
Keep in mind the 1996+ models had the "Vortec" FI which has much more power but is also much more problematic than the old TBI systems. It could be a 1994-95 Model which still has the TBI engines. Also, have a good look at the tranny, some 4L60E's run a long time trouble free (like mine), others blow-up.
BTW, this truck is a half-ton, so it will be 350 powered. Only the 2500s came with diesels and 454s. I'd avoid the 6.5L diesel like the plague anyway...very problematic.
Again, I think if it checks out, a good purchase for someone who is mechanically adept.