A Banksy mural that was stolen from the side of a London discount shop last week has popped up at an auction house in Miami. (And nice work, Neighborhood Watch, for letting someone make off with an entire chunk of the wall.) The mysterious artist spray-painted the satirical graffiti during the Queen's Jubilee last summer, calling out the use of sweatshop labor in her celebrations. Since then, the mural had drawn a steady crowd of Banksy-spotters to the side of the shop. The Miami auction house insists that it came from a "well-known collector." It's expected to fetch up to $700,000. "Residents have been really shocked," one London city councilman said. "Banksy gave that piece of art to our community."