If you don't want to deal with the auctions on GunBroker, check out Brassman Brass, www.brassmanbrass.com. He has 9mm once fired for $55 per thousand, shipping included and 3500 cases, mixed headstamps for $150 delivered. I've bought .223 brass from him and would buy again.
Cabela's in Buda has new Remington .308 brass for 38.99@ 100. After I got one they had 600 left. Ouch. Also try top brass.com, they have some good Lake City Brass.