"The value of Andy Warhol's work has been on an endless upward trajectory since his death in 1987. In 2014, his works accumulated $569 million at auction, which accounted for more than a sixth of the global art market."
https://en.wikipedia.org/wiki/Andy_Warhol#Art_market
"The value of Andy Warhol's work has been on an endless upward trajectory since his death in 1987. In 2014, his works accumulated $569 million at auction, which accounted for more than a sixth of the global art market."
https://en.wikipedia.org/wiki/Andy_Warhol#Art_market