slightly used is better b/c it still has the new car warranty for a while. Then you can opt for the extended if you think you need it. still, have it checked out THOROUGHLY! I'm always highly suspicious of practically new cars on the market. Why would anyone take the big hit in depreciation by selling a brand new car unless something was seriously wrong. I sold my Cherokee after 6 months. Took a big hit, but didn't feel too bad b/c it was a piece of crap and I thoroughly abused it in the end.