To sell off my stuff I sold the good stuff at gun shows.  
But at the gun shows I met other sellers that only dealt in used parts, scopes, wood stocks, or brass etc. and were willing to pickup the vast assortment of items I would never get rid of individually.  
I got rid of my good brass at the shows but made good money selling the unwanted ones to a metal salvagers when brass prices were very high.  
I still have a few items remaining like cleaning rods, cleaning patches and solvent, moose milk and dies which I donate to new shooters and handloaders. 
When I sold my rifles I sold them as package deals with the molds, dies, cleaning patches, cleaning rods etc. required to handload or use that rifle.