Just because you live in a state that salts the roads, doesn't mean your vehicle has to be rusted out. I lived in Michigan, most of adult life. None of my vehicles ever rusted out........kept them a minimum of ten years. When I sold them they went fast, usually by word of mouth. There are precautions/maintenance to do. I only ever bought new vehicles. When new, they went straight to the Ziebart or Tuffcote dealer.............before the manufacturer's went to galvanized dipped sheet metal. I also hand washed my vehicles, after every snowstorm, using only fresh water...........as soon as the temperatures were above 33 degrees. Paying particular attention to the undercarriage. No car washes that recycled salt tainted water. If you put in the work, you reap the rewards.
Currently, have three vehicles that survived Michigan's salt. Two full size Chevy vans (2004 & 2010) in near mint condition. And my 1972 Chevelle Super Sport, which was Ziebart-ed. All have seen salt but no rust. Even here, in Arkansas, they use rock salt and or brine to treat/pre-treat the roads.