Auction house Sotheby’s said on Friday that Italian artist Maurizio Cattelan’s “Comedian” duct-taped banana artwork is up for auction once again, this time at an estimated $1 million to $1.5 million. What Happened: “Comedian” is a piece of conceptual art involving a banana stuck to a wall with duct tape. Whoever wins the auction can take home the banana, duct tape, and also a certificate of authenticity signed by the artist, according to Sotheby’s. However, buyers are not acquiring the physical banana itself, but rather the certificate of art. When the banana eventually decays, owners are inst…