This happened for me a couple of times many years ago when I was an amateur radio operator. I lucked into a few good radios and accessories that way. Never been lucky enough to find any musical instruments or accessories of any value though.
The Radio Shack Moog is a great find... I'd love to find one myself. I'm guessing it's the MG-1 ? Very decent filters on those as I remember them.
AJ
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AJ