At the time of Andy Warhol’s death in 1987, there were about 50,000 photographs, many of them Polaroids, in his estate. The Warhol Foundation gave many of the pictures, which at the time were valued at next to nothing, to small museums. The rest have largely gone unseen. A little over a decade ago, Jim Hedges, a retired investment banker and friend of Ivory Row, began aggressively acquiring photos from the Foundation. He now operates Hedges Projects, a private dealership focused on all things Warholian.

Last spring, Hedges Projects sold some of its works through the online luxury goods retailer 1stdibs. Now, the Web site is back with a second batch, titled “I’ll Be Your Mirror." The works go on sale online on Sept. 6. Hedges has also curated them in a brick-and-mortar exhibition at 1stdibs’ 10th floor gallery in the New York Design Center, on view through Oct. 7.

The images on sale and on display represent the mature period in Warhol’s life, after the Valerie Solanas shooting and the heyday of the Factory as a countercultural mecca. Warhol’s pictures aren’t widely heralded, but photography was a medium that he became increasingly serious about late in life, and might well have pursued more fully had he lived past 1987.