How best to divest of aviation philatelic items


I have a binder full of BEP souvenir cards, leather-bound (?) Rocket mail item, and numerous CAM covers, cachets, carrier-damaged pieces, old airmail pilot/plane photos, and others. So far, my first attempts - to auction BEP souvenir cards on ebay - have been unsuccessful. Is this pretty much the expected result? Now, am wondering if it's even worth the effort to list all the other items.

Any thoughts on how, or where to attempt to sell off these items?

Can post pics if that would help, but am shy about even expending the efforts to research and describe all this stuff.

Insights appreciated.