Yvan Theys ( 1936 - 2005 ) was a Belgian painter. Yvan Theys s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2234.4 USD for Gestreepte peren no.3 in 2003 to 5102.46 USD for L'INVITATION - DE INWIJDING in 2010 , based on the size and medium of the artwork.