Those look remarkably like a set of Heathkit Ham radios I had years agao. The entire set consisted of a transmitter, receiver, power amp and speaker.
I don't know what they're currently worth but I'll check with a friend of mine who is still into the old ham radios. I can tell you one thing! If I lived closer to your location, I'd definitely make you an offer on that set, just for nostalgic purposes. Would be great to have them again!!! I also remember that they were heavy as hell!!!