Dealership extras such as the extended warranty, rustproofing, roof painting, fabric protection and carbon ceramic brakes are extras that you don’t really need when purchasing a new car. To get the best deal, make sure to avoid such offers. Luxury car manufacturers go an extra mile unlike regular vehicle manufacturers to ensure that the vehicle is sold in its best condition. In fact, some extras might end up costing you a lot of money and depreciate the value of your car.