Watch this video about how to shop for cars - starting with online on HowStuffWorks. A decade ago, automotive websites revolutionized the way people shop for cars, making online research a must for any savvy shopper. Today, websites such as cars.com and ConsumerGuideAuto are hoping to transform the process again by bringing automotive listings and prices to your fingertips. Some are even bringing it to your cell phone, as you'll see in this video courtesy of MultiVu.