NY RP ACT & PRO § 232. Purchases by certain officers prohibited;  penalty

No officer making a sale as prescribed in , or guardian of an infant party, or any person for his benefit, directly or indirectly, shall purchase or be interested in the purchase of any of the property sold;  except that a guardian, where he is lawfully authorized to do so, may purchase for the benefit or in behalf of his ward.  The violation of this section is a misdemeanor;  and a purchase made contrary to this section is void.