Ranch: $31.7 million is requested by a 27,000 acre South Now $31.7 million is requested by a 27,000-acre South Dakota ranch; bison is not included. Ranch Ranch For an astounding $31.7 million, a nearly 27,000-acre untamed and rough bison ranch in South Dakota is up for sale. With a five-bedroom main residence at its heart, the Dakota Partnership Ranch is undoubtedly the most expensive...