A retail installment seller may advance money to a buyer or pay money to a third party on behalf of the buyer to satisfy a lease on or a lien on or a security interest in a motor vehicle used as a trade-in on a motor vehicle which is the subject of a retail installment transaction under this article. Any amount so advanced or paid may be financed as part of a retail installment contract and shall not be considered a loan. The transaction and the seller making such advance or payment shall be exempt from the provisions of Chapter 3 of Title 7, relating to industrial loans, from the provisions of Chapter 4 of Title 7, relating to interest and usury, and from any other provision of Georgia law regulating loans.