I usually try to give the used parts to my buddies because audio equipment is continuously being upgraded with newer versions being introduced in the markets, every few months. Another option is you could sell them to used car parts dealers like autopartsfair.com to earn some extra bucks. Audio components are sold at a variety of car electronics and stereo stores. There are plenty of options available in the market whether you are looking to sell or buy them. You can go online and search for stores or dealers that deal in used car parts and other equipment.
