Evaluate your budget. Certain types of car models are very rare and can range in price up to a high price. Know what kind of car you can afford before you start a collection.

Be familiar with the series of certain cars.

Know about different types of muscle cars and what years they were made. A "muscle car" indicates a high performance vehicle, often flashy or showy.

Be familiar with different types of race cars, such as the Chevrolet Camaro and Corvette and the Ford Mustang. Know what makes a race car different from other types of cars--it's not just speed.

Know types of high-end exotic cars, such as the Ferrari, Mercedes, Lamborghini and Aston Martin. These cars are usually "showier," often have very high top speeds and can be very expensive.

Find out about old military vehicles, such as the Jeep. Know about other models of military vehicle, such as the Dodge M37, of the 1950s. Know what makes a military vehicle different from an ordinary commercial vehicle.

Be familiar with cars that are no longer in production. Know that just because they are no longer being produced does not necessarily increase their value. Often, production on a line of cars will decease because it is not in high demand.

Be familiar with custom hot rods and street machines. A hot rod refers to a car that has been rebuilt or modified for increased speed, while a street machine refers generally to a hot rod built after 1949. Decide whether you simply want to buy such a car model directly, or modify and rebuild it yourself.

After analysis on the types and series of different cars, you can decide which type you pay on. And pls keep collecting the whole series of certain type to keep the continuity and integrity.