Those trucks go for top dollar in my area, so to me the price is ball park and the mileage is low. If the frame is rusty, I mean really rusty, walk away. Slight rust spots on the frame here and there from normal wear is not an issue, if it's like cancer and pitting the frame all over the place, it is an issue, otherwise if you are not in a corrosive environment yourself, than it's NBD.