Find Used Cars in Warren at CarsDirect.com. Metro Detroit's largest suburb, Warren, has an estimated population of about 139,000 residents and is the third largest city in Michigan. Home to many Big 3 Automaker facilities, Warren residents know their cars. However, they also know that getting around the Warren area during rush hour is no easy task. Whether you live in Center Line or Roseville, trying to find your way through traffic on the Walter P. Reuther Parkway to get to a used car dealership can be stressful. That's where CarsDirect can help. CarsDirect can help you save not only a lot of money on your next used car purchase, we can help you save time as well. Instead of trudging around to find a deal on a used vehicle, do what many others in Warren have already done: use our easy to browse website to find the best prices on used cars in the Metro area. In fact, we have thousands of vehicles listed by Warren residents and dealerships right now. You will save so much time and money that you'll have time to take the family to a Lions or Pistons game or perhaps a day of shopping at the Universal Mall Shopping Center. Don't waste any more time searching for a deal on a used car. Let us show you why CarsDirect is the best source for used cars in Warren, Michigan.