S.D. Codified Laws § 54-9-13.9
All sales as provided in § 54-9-13.8 shall be had at public auction unless otherwise ordered by the judge. Upon application to the judge, and for good cause shown, the assignee may be authorized to sell any portion of the estate at private sale; in which case he shall keep an accurate record of each article sold, and the price received therefor, and to whom sold; which account he shall file at once. Upon application by the assignee or a creditor setting forth that a part or the whole of the estate is perishable, the nature and location of such perishable property, and that there will be loss if the same is not sold immediately, the judge, if satisfied of the facts stated and that the sale is required in the interest of the estate, may order the same to be sold with or without notice to creditors.
SDCL 54-9-13.9