MDNA is an international, nonprofit trade association dedicated to the promotion of the used machinery industry. It was established to assure buyers of the integrity and reliability of hundreds of used machinery dealers from around the world that are members of our association. The foundation of the MDNA is our Code of Ethics. As a condition of membership, MDNA members agree to abide, unequivocally, by the terms of the Code, and renew this pledge annually. The Code is policed by the association's membership.