Not uncommon where I live. I passed on a '93 full-size Blazer with 80,000 miles because it sat outside it's whole life as a plow truck. It was in similar shape.
No rockers (not exaggerating), all fenders had rust holes, floor was going...Frame, axle, rear floor, and control arms extremely scaled.
Interior parts and under the hood looked exceptionally nice for the year. Started and ran fine, but would have been a mountain of money and work to restore even at the time.