Mixed headstamp 30-06 that has been tumbled but not further processed is about $20/100 at it's cheapest (bought in lots of 1000).,,plus shipping usually.
It's always advertised as 'once fired' of course.

I don't know what the recycle price of cartridge brass is today, some places won't even take it around here.

Weigh it and call and ask the days brass prices. See if you can score more by simply recycling than trying to sell it at a 'please go- away- quick price' for the lot in a pre-paid USPO Flat Rate Box included.

Just my thought..