It shall be unlawful in all cases in which an article pledged has been forfeited, for a sale or other disposition thereof to be made by the dealer within the period of six months after the forfeiture of the pledge, unless the period of loan is less than three months; in which case, the period of redemption shall be three months. During such periods the person shall have the right to redeem such articles at no greater advance than five percent per month on all sums up to and including $50, and three percent per month on all sums in excess of $50; provided, that the dealer shall, in any event, be entitled to a minimum charge of $1.