Editors' picks: $12,000 used convertibles, no Miatas allowed

Summer is just around the corner. So what could be better than a convertible in your driveway? Our editors have picked their favorites you can buy for just $12,000 -- less than America's cheapest new car. We used NADA Guide pricing data, assumed 12,000 miles per year and selected "Clean Retail" values to keep things fair.