Doubt you will get much for any of these on GunBroker, unless they can be identified. In an auction, these are just a pile of "Miscellaneous Parts."
There might be a few real gems in the pile, as a few of the Milsurps experts have identified. Take your time, know what you have, and seek a fair deal.
You might propose that anyone who can identify a piece and wants to buy it gets 50% off fair market value or best offer if two or more want it. This uses the honour system, and I think you can count on Milsurps members to be quite honourable. What's left unidentified might be able to be sorted into some categories, like: shotgun, rifle, carbine, machine gun, revolver, etc to help attract a good buyer.
BTW, in these photos looks it looks like a large proportion are from shotguns -- find a shotgun forum to make your queries for these.