I'm sure you are centering your retirement income around all those "valuable" radios.
Also, you have to include your time in that equation. Going to tests, doing repairs and rest only takes away from any perceived value, even if you got the the radios free. It's likely you could make more working at McDonalds per hour than buying/selling and working on radios.
Too much of it comes from flawed thinking that these radios will be worth something like vintage cars. Not so. Adjusting for inflation, most of this stuff is not worth any more than it was new. The market demand is just not there. If some want to keep their stuff original, fine. I don't really care. Just please do not act like you are doing something special or significant.
True if it were purchased new. I bought many of my old radios before they were cool.