Guillermo Perez Villalta ( 1948 - ) is a Spanish painter. Guillermo Perez Villalta s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 8035.49 USD for Joaquina y Guillermo en la calle in 2005 to 50898.2 USD for Mi hermano y yo en una azotea in 2007 , based on the size and medium of the artwork.