A single lot of four Obey prints by graffiti artist Shepard Fairey have been valued at $3,000-4,000 in the run-up to Wright's Mass Modern auction in Chicago on July 12.
The works date to 2009 and are taken from the artist's long running Obey series, which evolved from a series of stickers the artist produced in 1989.
They feature an image of French wrestler and actor Andre the Giant and text reading "Andre the Giant Has a Posse".
While the campaign began as an in-joke, it swiftly spread around the world - making Fairey one of the world's biggest graffiti artists and spawning a successful clothing line in the process.
Fairey would go on to create the iconic "Hope" poster for Barrack Obama's 2008 presidential campaign.
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