As to Pappy's original question, the same issue comes up when trying to buy a gun. (Not "I want to buy a gun, someone take my money" but when looking for something specific.) Forums like CAS City or the SASS list have a rather limited pool of potential buyers/sellers. If you have a specific gun for sale (or are looking for a specific gun) it may well be that no one is looking for (or to sell) that specific gun.
And you have to wade through the dross. "Would you trade for X?" "Have you tried Buckeye Bob? He might have one" (but never telling how to contact "Buckeye Bob"), plus all the friendly and oh-so-helpful discussion about the gun you should be selling ("I'd take it if it was a Remington, in a different caliber") or buying ("You really should try a Whatever, it works for me").
I gave up, and while I still watch the classifieds here I mostly shop on Gunbroker--but that isn't a lot better. From what I can tell, most of the sellers have NO IDEA what they are selling. The use of "stock pictures" and the lack of use of catalog numbers just makes it worse. I've spent the price of a decent revolver just on return shipping and "re-stocking fees" from folks who couldn't describe the gun they had in hand.
So if you're going to try Gunbroker or one of the auction forums (even if you have a local gun store list it for you on commission) make sure the listing includes good pictures, the catalog number, and a description that doesn't read like it was written by some idiot with a hangover. That might be enough to get you more bids, and help find an honest seller.
(I'm still laughing over the clueless fool who listed a 7-shot Remington .44 caliber "1851 Navy". But he ticked all the bases, even if it was a repro Starr. . . . )