It looks like there could have been work to the rear of the outer sills, and they and the bottom of the doors have been repainted. Its at the stage underneath where it will need a good clean up and rust proofing, looks original brake pipes which wont last much longer. As with the other one its probably going to need some spending in the short term to last long term, and its likely almost all of them will giving their age. There are proper experts on here who can advise better maybe, or even help to view / advise a truck for you, so it may be a better choice to spend more on purchase and less on remedials or haggle hard to have the remedials included in your budget. There could be some bargains to be had in the current climate, but the time of year adds to the 4x4 premiums.