The satirical Bansky graffiti are among the most sought after modern art works in the world. Although, the pseudonymous graffiti artist does not sell his reproductions or photos of his artworks publicly, nevertheless, they are often auctioned by collectors, where the excellent works are sold for hundreds of thousands of dollars. The most expensive work of the graffiti artist is a graffiti titled ‘Keep It Spotless’. In 2008 it was sold at the Sotheby’s auction in New York for over $1.8 million. The other million dollar artwork of the artist is the Simple Intelligence Testing. The website arrestedmotion.com has compiled a list of the 25 most expensive artworks of Bansky.