There will be two homebrew stores opening soon in the Charleston area. I know one of the guys but not the other. One is in Mt. P and the other is in North Charleston.
I generally get full sacks from Holy City and order everything else from Rebelbrewer.com, I'm interested to see how the local stores do. I don't think the market can support two.
A bunch of us have been discussing a bulk buy through Low Country Libations - local homebrew club.