Negotiating a purchase at a car dealership can be a stressful experience. But once you sign the deal and drive away, the car is yours right? Not necessarily.NPR's Chris Arnold breaks down how some dealerships engage in a practice called a "yo-yo car sale" that can entrap people in bad deals. In participating regions, you'll also hear a local news segment to help you make sense of what's going on in your community.Email us at considerthis@npr.org.