Experts say the state's farmland could be significantly undervalued, following a surprise nine-figure sale in the Great Southern region. : Kojonup mixed farm sells for state record of $100 million, experts say WA farmland could be highly undervalued A property in the Western Australia's Great Southern region has sold for a new record price of $100 million and real estate experts say farmland values in the state have the potential to climb even higher. A Victorian buyer is believed to have purchased Cherylton Farms, a 8,500-hectare mixed farm in Kojonup.