Banksy has attained an almost worldwide domination of clever graffiti, people everywhere associate the name with the style and even with the aerosol powered spray paint art, although it may even be completely unrelated. Perhaps due to the mainstream not having many associations they can draw to street art they nurture their little knowledge of the art produced where it's not meant to exist.
Banksy artwork is very well known and he himself has become almost an anonymous celebrity, born in England in 1974 (near Bristol.) Banksy artwork is often satirical and features heavily on contradictions of stereotypes and politically active concerns, something Banksy has almost developed as a style, probably leading him to have achieved such remarkable popularity. But on the same note the work is not overly obnoxious, subtly it tugs on issues without blowing people out of liking it by being overly disgusting.
It's not often you see banksy work for sale, in fact a lot of it is on non moveable walls which makes for a difficult sale. But occasionally a you find a good lump of artwork by Banksy for sale. Often reaching prices of the millions at auction the real banksy pieces that do come up for sale are out of reach of a lot of the mainstream, something Banksy himself counteracts nicely with his website shop where everything is free.
Banksy makes us all realise that there's a lot of the world undocumented, un thought of and hidden from everyday view, and that things can always be twisted and a funny side can always be seen, even if it is dark satirical comedy. If you see a banksy for sale - buy it - then set fire to it or do something seemingly anarchistic!