I find all sorts of "treasures" at the pick a part yards, I leave them there though typically as my pick a part yards don't sell vehicles. I did find a Leatherman Surge sitting on the upper radiator support in an F250 a few years ago. I'm sure someone at the yard pocketed it after I left, I just left it at the front counter with one of their employees, so I'm sure they just stuck it in their pocket. I find random tools in vehicles frequently but they're usually the cheap dollar store stuff, not worth bringing home either.
I should have pulled the roll bar assembly out of the STX Ranger I saw a while back, but I have no use for it and it would be in the way at home so I passed that up LOL. Guess I could have got it and put it in my 87 Ranger, not sure how it would bolt in since my Ranger isn't an STX so it wouldn't have the mounting holes, and it wouldn't work because I have a camper shell on my truck anyways, which is far more useful than a roll bar on a 2WD truck LOL.