The best way to sell your car online is through a car-selling platform like Carvana, CarMax, Peddle and others. The best online retailer will depend on the condition of your car, if you’re trading in a vehicle, what kind of car you’re selling as well as other factors. For example, Carvana may be a good option for trade-ins and selling cars outright, while the site Peddle might be better for selling older used or damaged cars.