S.D. Codified Laws § 21-48-13 (2026)
The mortgagee, his assigns, or their legal representatives, may, fairly and in good faith, purchase the premises so advertised, or any part thereof, at such sale.
Source: CCivP 1877, § 605; CL 1887, § 5419; RCCivP 1903, § 644; RC 1919, § 2884; SDC 1939 & Supp 1960, § 37.3005.