How to get money for my old car

How do I get money for a car that nobody wants?  I love my old car and have been driving it since it was brand new.  I put a lot of extras in the car like TV’s in the head rest.  Me and my brother put a sophisticated sound system in the car and we would even play video games in it during long road trips.  But I don’t want the car anymore because its like and old relic that used to have value but nowadays I don’t even think a teenager would want to ride in this beater.  I don’t want to give it away for free unless I have to cause it must go.  I wonder how I can actually get some cash for this old junk car