Ola Billgren ( 1940 - 2001 ) was a Swedish Post-war painter. Ola Billgren s works have been put up for auction numerous times, with realized prices greatly surpassing estimated prices, varying from 6353.24 USD for UTAN TITEL in 2003 to a remarkable record 1407745.61 USD for Målning in 2013 , based on the size and medium of the artwork.