Charley Harper ( 1922 - 2007 ) was an American painter. Charley Harper s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 154 USD for Two Screenprints: Black Billed Magpie in 2015 to 3750 USD for Evening Grosbeaks in 2016 , based on the size and medium of the artwork.