6. Julian Stanczak
Change since 2000: +3,331%
A painter and printmaker born in Poland in 1928, Julian Stanczak lost the use of his right arm during World War II in a Siberian concentration camp. After he emigrated to the United States in 1950, his early work prompted critics to coin the term "Op Art" for works that use optical illusions.
Top sale price: $62,500 for "Linear Transit" (left) in March 2012.