Atlanta has a shortage of used book stores IMHO. This store has 4 locations that I've visited. The one in Marietta has the best prices, although it seems to be rather unorganized. The only negatives are: 1) the credit you get for trade-ins is minimal and restricted in how you can use it, 2) there is a minimum price on books of $2.40, as I recall, which makes some of the public domain titles comparatively expensive.
The store is not as good as McKays in Chattanooga, but is better than anything else in Atlanta that I know of.
more