Any person who sells, offers for sale, or purchases a catalytic converter from a motor vehicle exhaust system that has been detached from a motor vehicle, except when such sale, offer for sale, or purchase is made to or by a scrap metal purchaser that has adhered to the compliance provisions of subdivisions B 1 or 2 of § 59.1-136.3, is guilty of a Class 6 felony. Nothing in this section shall be construed to prohibit the sale, offer for sale, or purchase of a new catalytic converter that has never been installed on a motor vehicle.