The online retail giant eBay today launched a new section of its website dedicated to live auctions at Sotheby’s. Modern and contemporary photographs by Man Ray, Paul Strand and László Moholy-Nagy are among the works for sale in the first auction, which will be streamed live on April 1. The second sale of New York memorabilia, which includes a ten-foot-tall sign from Yankee Stadium from the collection of the basketball player Reggie Jackson (est $300,000-$600,000), takes place on April 2.