Grice Wholesale / Grice Gun Shop - Clearfield PA.
They usually have a shooters sale around about February, when people are starting to get their income tax check.
They then have a anniversary sale the end of March.
Both times they put brass on sale. You either buy it by 50 rounds - new brass or 100 depending on caliber and brand.
They probably always have it on stock.
http://www.gricegunshop.com/