subject: Owning a Car Does Not Have to Cost a Fortune [print this page] We all know the least cost-effective way to own a vehicle is to buy it new. As soon as you move it off the lot, you have already lost 20 per cent of its value. Being as cars depreciate quickly in value, the first year alone can cost you thousands just for buying it new. The best way to avoid this quick and steep depreciation is to buy used. There are many great deals to be had when it comes to buying a new car used.