Nissan didn't add active battery temp management until about the 2018 model year, so I'd be careful which part of the US you buy that van from depending on your interest in battery replacement.

When people ask "where are the <$30k cars?" they generally mean new cars, because the more $30k cars that are sold new should imply more <$10k gently used cars on the market. The used market doesn't get cars that people can't afford to buy new in the first place.