ROAD SALT victim in Texas

[1968aj]

I thought i had found the truck i was looking for. A 72 cheyenne super.it was a unmolested 1 owner solid blue with wood bed floor.i drove 75 miles to see it. The cab looked great inside and it fired right up. Everything worked on it.well; then i noticed a dealer emblem from minnesota . Looked under the truck and never have i seen this in texas. Everthing was rusted. You could stick your finger through the trailing arms and the frame was almost that bad.anyway the asking price was quickly cut in half but i couldnt tell him i would not give $500 for it for parts. I did not take pictures. Why do they use this stuff on roads? There has to be a better way. Anyway the search goes on.