If your car has a few years on it and you are looking to improve it with some new parts, maybe a CD player, GPS systems or something else, you may want to look online for these parts used rather than new. A new part can cost hundreds of dollars while a used one can cost much less. If you are going to spend the money to add something to models like Amanti, Rio, Optima, and others, then the smartest thing to do is buy the parts used. They will be much cheaper but still high in quality; it is the only way to do it that really makes sense.