Lucky art buyers walked away with a deal after unknowingly purchasing artwork by famed graffiti artist Banksy.

In a short video posted to the artist's official website, an unidentified man is seen sitting next to an art stall near New York City's Central Park - selling spray art for $60 (USD) each.

The first sale comes from a woman who buys two pieces after bargaining a 50 percent discount.

The video ends with the gentleman packing up the booth after an 8-hour day racking in $420 (USD).

Some reports say each piece of art is easily worth $20,000 each.

Banksy, a pseudonym for the elusive artist who first emerged in the streets of Bristol, England and whose real identity is unknown, is in the middle of a month-long project across New York City.