Looking at used 2008 Infiniti M35's with very low (10k) miles but all are from northern states (ND, WY, MI, MT). I live in the south. Am concerned about rust from salted highways & streets and possible future rust problems and salt corrosion. Anyone have any experience with Infiniti and rust from winter driving? Is this car prone to rust? Should I stay avoid buying one that spent a winter or two in snow country?