Johan Gustav Sandberg ( 1782 - 1854 ) was a Swedish painter. Johan Gustav Sandberg s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 934.84 USD for Porträtt av professor Per Sjöbring in 2005 to 19902.48 USD for Tvenne barn som lysa på en byst in 2012 , based on the size and medium of the artwork.