TrueCar Buy New or Used Cars, Compare Price from Certified Dealers Promo Code. TrueCar.com is an automotive pricing and information website for new and used car. TrueCar members have an access to a network of more than 13,000 Certified Dealers. You can compare, prices paid by other members for the same car. TrueCar has collected millions of transactions, nationwide. As a member you know exactly what people are paying in your local area.