Pretty cheap. Definitely seen some salt before. I'd bet the inside of the frame isn't exactly rust free. Someone also drilled a giant hole in the side of the frame near the front crossmember. Is that factory? Don't remember ever seeing something like that before.
EDIT: That hole definitely isn't factory from my 2 minute google-fu. I bet the nutserts broke off inside the frame due to rust and that was someone's way to fix the problem. I'd pass.