So I installed a Sony double din DVD receiver, and now not sure what to do with the old radio. Seems wasteful to throw it out....thoughts?

 

Craigslist?

Maybe someone in an older car has a problem with theirs, like the kids poured a Slurpee into the dvd slot.

At the very least drop it of at the scrap yard, they would sweat the solder out and recycle the metal parts.