A bit off topic but still related, make sure it has a title. By that I mean a clean title in the hand of the seller.
When I bought my 58 Burb it was advertised as having a title. Turns out the title had been misplaced and had to be reissued by the state. We were eventually able to work it out but it was a pretty emotional 90 days. Like Grigg said, my check had cleared my bank and I had a truck sitting in my driveway. Couldn't register it because I didn't technically own it.
I'm sure others will respond for/against my position. I know titling rules vary by the age of the truck (VIN vs. no VIN; frame stamped vs not stamped; titled off the engine serial number instead of the VIN etc.) and the state in which it was registered. That being said, I wouldn't buy a truck without a title. Make the seller do all the necessary leg work before paying for the truck.
If your goal is nothing more than getting a parts truck to strip, I guess you could buy one without a title. If not, insist on a title. Food for thought.