Oregon is prime territory for finding what you are looking for as it rains a bit up that way and some FGRV owners just don't do preventive maintenance to keep the rain on the outside.
As a result it's possible to find one with water damage that the owner doesn't want to tackle. Unlike stick-builts, other than floor damage, there's really not much that water leaks
can damage in the shell itself.
Start scouting those units you see parked along side of farm buildings and in fields that seem to have a lot of grass growing up around them and restart from scratch.
If you see a sticky like that, keep driving.....LOL