You should be able to pick up a solid frame for <$5000, and then you'll have a good frame, not a repaired frame. But then you'll also have other areas of rust to look for in the body, bolts that hold suspension together... etc... Start chasing all the gremlins, I think you need to start out with a <$2000 Jeep, and basically rebuild every component to get to a $10k value. I tried selling my 2005 back in 2017 for $11k, and had no takers. Light surface rust only on the areas of frame and suspension that are exposed to the Sun. (has only been a FL Jeep) all stock, except has a Bestop NX Trektop and 31's... I still have it, and will not sell it now. (although, in it's condition I could probably get $15k or more from the salt-belt crowd)