I have been collecting this stuff for a couple of years.
I don't have a .357 Sig and don't see one in my near future.
I am now staring at about 3,000 (maybe more) cases.
They are mixed head stamp. Some are Nickel.
Not cleaned etc.
I see them going for all sorts of varied pricing & conditions of finish.
The question is:
What would be a "good" price for an average guy/gal wanting some extra brass?
I don't want to give them away, but don't want to over price them.