Pay attention the the cab inner roof skin right above the windshield as well. The sealer in the rain gutters tended to dry up and allow water in the cavity between the roof skin an inner skin. They do make a replacement for this area as well. Everything these guys have told you is good info. I wouldn't go over 800. We have bought multiple trucks that run in this price range. Even though you like the long bed, they are the least desirable. Kinda like a 69 Firebird vs. Camaro. Good luck! I would love to see more trucks get some love!