There is now a forum for absolutely anything and everything. Any group of people with any sort of unusual hobby has an internet gathering. This forum is a great example
When selling one of a kind "more than scrap" type of item, I found it very useful to register on a corresponding forum, introduce myself and then describe what you have. It helped me A LOT when I sold a few vintage computer and stereo equipment. You get info on how much it might be worth, you get recommendations on how to fix stuff if it's broken plus you may get buyers. Especially when you think you might get more than a few bucks for it, I think your time invested in the research may pay off. But YMMV of course...
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