Hannes Gruber ( 1928 - ) is a Swiss painter. Hannes Gruber s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 602.31 USD for Sonnenblumen in 2006 to 2139.95 USD for Blick von einer baumbestandenen Anhöhe in ein Tal in 2012 , based on the size and medium of the artwork.