Are you a fan of Banksy? If so, see amazing documentary Banksy Does New York, directed by Chris Moukarbel, which talks about Banksy's experimental one month residency in New York City, where he sets to surprise public every day with new work around the city unannounced.
This fragment talks about one day of the month when he sets up a stall near the Central Park and sells his original work for $60 a piece. In just this one fragment Banksy makes a good point of how art is nothing without attaching a famous name to it. Genius point.
Watch what happens...you'll be blown away.