American Land Network
   Farm land acreage and ranch land for sale in South Dakota, including residential property, hunting property and commercial property.
   http://americanlandnetwork.com

South Dakota Multiple Listing Service
   Statewide directory available to all real estate professionals. Includes agriculture, business, commercial, recreational and residential real estate for sale, lease, auction and exchange.
   http://www.south-dakota-mls.net

Sunbelt Business Broker
   Listings, agent profile, and links.
   http://www.busimarket.com/members/company_detail.cfm?company_id=41