and where the effect of such below-cost sale or discrimination may be substantially to lessen competition or tend to create a monopoly, or to injure, destroy, or prevent competition with any person who either grants or knowingly receives the benefit of such below-cost sale or discrimination, or with customers of either of them. Nothing contained in this Code section shall prevent differentials which make only a due allowance for differences in the cost of refining, sale, or delivery resulting from the differing methods or quantities in which such product is sold or delivered to such purchasers. Nothing contained in this Code section shall prevent persons from selecting their own customers in bona fide transactions and not in restraint of trade. Nothing contained in this Code section shall prevent price changes, from time to time, which are in response to changing conditions affecting the market for or the marketability of product of the grade and quality concerned, such as, but not limited to, imperfect or damaged product, obsolescence of product, distress sales under court process, or sales in good faith in discontinuance of business at a particular location or with respect to the product itself.
OCGA § 10-1-254