Jimmy, there are two that are just outside of Atlanta. Off of I-75 exit 222 there is a Antique Mall, Peachtree Peddlers. There is a hotel liquidation center off of exit 233 and they have some great things from hotels all over the country that are sent there. Many times they have items that are from the lobby areas of high-end hotels being remodeled. Depending on where you are staying in Atlanta, these are 15 and 22 miles south of Atlanta proper. I can run by the hotel liquidation location if you want the name, I cannot remember it off hand.
One of the largest antique markets in the US is also near, however that market (Scott's Antique Market) occurs the second weekend each month. Thursday-Sunday. You will have missed it this go around, but again, it is monthly and fills two very, very large former department stores (Richway/Target and Treasure Island) as well as outdoor space.