my 99 "bus" [caravan] came from arazona, although it was bought new in Pa.
looks like new underneath, because it lived there until the original owner passed away, then his daughter brought it back.
it has beer dents, but the only mark it has from rust is in the bottom of the passenger's rocker where the factory foam is.
i blew a small square hole in the bottom, removed the foam, sprayed the devil out of that area and ahead inside the rocker as far as the gun would blow the oil, then quickly welded a patch on after the oil had quit running out. [a few weeks later]
every winter i oil it up, removing the tail lights and all the factory rubber plugs, plus the extra holes i drilled and plugged in all the doors, dog legs and gate.
this "should" be the last "bus" i need to buy in my lifetime. [i hope]