Also CO and UT are salt states. Those are gonna be some rusty cars underneath if the lived their lives there.
I have never dealt with them but there's a small dealership in Kansas or Kentucky (edit: Missouri) who deals with off-road specific vehicles. They've had a few real nice cars pop up but I can't remember their name or I'd link the site. Still do your research but they're more likely to get you all
Found it: Adventure Motors
Toyota 4runners for sale in Lee's Summit, Missouri 64081
They even take undercarriage pictures of most of their cars