Demeter Koko ( 1891 - 1929 ) was an Austrian painter. Demeter Koko s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3248.86 USD for Heufuhr in 2004 to 10439.56 USD for Ländliche Idylle in 2016 , based on the size and medium of the artwork.