How's about a NIB CMP23W. Never even taken out of the box.
It's been sitting on my shelf since I bought it for a new SH radio I had just installed in a small sailboat (in the cabin), but never installed the RAM mic, and didn't need it when I moved that radio to a big sailboat shortly after I got it, since the radio in the big boat was at the helm. It's been sitting for at least 10 years, and probably longer, never used, and never even slipped out of the box.
Dust on the box is included at no extra charge.
$75, including UPS to Florida.