This subtitle does not apply to an advertisement, offer to sell, retail sale, or wholesale sale, if the merchandise: Is sold in a bona fide clearance sale and is so advertised and marked; Must be sold promptly in order to prevent loss; Is imperfect, damaged, or being discontinued and is so advertised and marked; Is sold on the final liquidation of a business; Is sold for charitable purposes or to relief agencies; Is sold on contract to a department of a government or governmental institution; Is sold by an officer acting under the order or direction of a court; Is sold at a price set in good faith to meet competition; or Is motor fuel sold by a retail service station dealer.