Well,
unfortunately, the depreciation values on our vehicles suck. It looks like KBB rates a private party value on your 2 door of between 3-4k.
I don't think you'd want a used stratus or malibu for that price. I guess if you had no problems with getting an older vehicle than your current tracker, then it's probably ok.
If you do go older, you should look at getting something foreign, like a honda accord or toyota camry. They just tend to last longer.