Artist & Craftsman Supply, 981 King St., Charleston, SC. This store is amazing, offering a wide range of art supplies for almost every medium. Artist discount of 20% if you belong to a guild or art association in SC. You can also purchase online at: artistcraftsman.com
Jerry's Artarama professional grade and a reasonable range of most student-grade and professional artist grade materials. Jerry's has locations in Raleigh, Boone and Asheville, NC or online at https://www.jerrysartarama.com Sign up for their newsletter and be in the know about all their amazing sales!
Dick Blick is located in Savanah, Ga., Sign up for emails and shop online presence at https://www.dickblick.com
Cheap Joe's online and also in Asheville and Boone, N.C. offers both professional grade as well as student qualify art supplies. www.cheapjoes.com
And of course, local big box stores such as Michael's and A.C. Moore offer art supplies as well.