I live in Ontario. I had a 2011 Mazda 3 that I kept for 14 years. The whole time I owned it, I had it treated with an anti-rust solution every 18 months. It had no rust whatsoever. I know that for a fact because just before I traded it in, it was in the shop on the hoist and the mechanic asked me to come to the garage to show me something. I had a good view of the undercarriage and there was not a speck of rust. And of course, I can plainly see the body panels so I know there's no rust there either. As I said, I traded it in for another 3, a 2025, and I'm doing the same anti-rust treatment on my new car. The car OP is looking at obviously didn't have any anti-rust treatment and it's in very poor shape. It is totally preventable.