According to a video posted to Banksy's blog, the anonymous artist set up an art booth Saturday morning. It looks to be around Central Park South in Manhattan.
It took hours for Banksy to make his first sale, and it was only after he agreed to a 50% discount from the $60 list price.
He appears to have sold many more throughout the day.
People are tweeting about how the unknowing buyers have just stumbled upon small fortunes.
Perhaps that is why the salesman hugged every purchaser.