There must have been a middle where radios weren't sold, because radios were always present when I was going to radio shack. I remember my friend buying an RC car (Radio Controlled) from theShack with a boat load of their batteries. Very distinct memories of having the mall security chasing us after he opened it up and was driving it around the mall. They were also into radio gear like tuners and speakers for home/auto.

This very selective memory of theShack not offering radio equipment is divergent from my experience