It depends on the club. Some antique car clubs do in fact require you to have a car if not multiple cars. Others you do not.
modern car
The address of the Antique Car Museum is: 3550 Mahan Dr, Tallahassee, FL 32308
The web address of the Antique Car Museum is: http://www.tacm.com
Whether selling an antique car is a good or bad idea depends on what is important to the seller. The seller has to determine what are the goals of trying to sell an antique car and whether they are worth the trouble.
The phone number of the Antique Car Museum is: 509-779-4204.
In Connecticut USA, 25 years or older can be registered as an antique.
The age of the vehicle, the model of the vehicle, the area that it was made. You have to also consider the color, and the type of interior that the vehicle has, including the options that it comes with.
a car is classic if it is from before 1981
The web address of the Antique Car Museum Of Iowa is: www.acmoi.com
When a classic car becomes a antique, it's value increases due to the popularity.
On the average, though, for a car to be considered a "Classic Car" it must be at least 25 years old, and 50 years old for it to be considered an "Antique Car".