AdvertisementWhat fees or commissions will you actually pay when selling your car online? When opting to sell through a local dealer, commissions are upfront, while post-sale costs include RC transfer charges. Is Selling a Car Online Really Free, or Are There Hidden Costs? Free in the context of selling a car online is technically true for some parts of the process, while not for others. Factor in RC transfer costs, even if the process itself is handled by the platform.