Have you ever heard of a car buff before? Do you have an interest in a type of car of your own liking? Some people, like Jay Leno for example, collect a lot of cars as their own personal hobbies. Sometimes, car owners have redesigned the cars to show personality and style. Expensive cars have a lot of potential of showing power and strength just by looking at them. Here are three general categories of cars: luxury cars, fast cars, and family cars.Luxury cars first appeared on the market around the 1930's. The rich and famous usually like to buy these types of cars and then try to change the cars in order to fit their personal requests. The most expensive car in the world was the Duesenberg. It sells for almost 1.2 million dollars. Only a few people still own the Duesenberg, since that it is a very rare car to find