Oswoldo Guayasamin ( 1919 - 1999 ) was a painter. Oswoldo Guayasamin s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 6500 USD for ROSTRO DE MUJER in 2010 to 49311.69 USD for Weinende Frau in 2014 , based on the size and medium of the artwork.