If ever there was an incentive to finally clean out your closet, it’s Cathy Naso—the former part-time receptionist at Andy Warhol’s Factory recently found a self-portrait of the famed pop artist in a forgotten closet after 40 years. Sotheby’s will auction off the print that Warhol inscribed to Naso in 1967, two years after she began working at the Factory. Though Naso did display her boss’ work briefly, she soon stored it in closet, where it remained until this year. Naso’s Warhol is estimated to bring at least $1 million, at Sotheby’s November 11 sale of contemporary art.