[bouncytruck]

I think a lot were sold originally in the Pacific Northwest because they appealed to the "outdoors" type. They have stood the test of time here because they don't (or didn't) salt the roads in the winter. You'll see less of them along the coast where there is more salt in the air, but the rain is fresh water so the rust isn't quite as bad as the mid-west and north coast rust belt areas. There are a lot in California where the convertable aspect was more appealing. I think many of the Northwest trucks didn't see much, if any, time with the top of in their early years, which helped keep the seals tight and moisture out of the insides.

All the rust-free AZ trucks have been sold the to the mid-west guys...