The provisions of § 31-5-19 shall not apply to an auction of classic motor vehicles or antique motor vehicles as defined in § 31-1-3. A “classic motor” vehicle means a motor vehicle that is not sold in the normal course of business by a dealer and is determined to be a motor vehicle having some unique or special value as a collectible, as defined by the department. The department shall have the power to license the auctions and provide for any rules and regulations that it shall deem appropriate.