If you actually believe that $30 is considered "an investment" then holy cow.. I gues you'll need to haggle...lol
You can hardly go out and by a nice dinner for less than that nowadays...
.. so to me $30 is simply pocket change.
....and If I had the chance to buy a nice old radio in "good" condition for that... and it worked too?... I would jump at it.
But then... I am living in the 21st century.