Brian Wallace wrote in with this information about a (now) antique poop art project. Italian artist Piero Manzoni put his stuff in a tin can, and marketed and sold it as “merda d’artista” back in 1961.
I learned at a CBC Arts News Site dated July 8, 2002 that: “The Tate Gallery has paid £22,300 ($52,000) for 30 grams of the feces of Piero Manzoni, a 20th-century Italian concept artist.” The article went on to say among other things that the Museum of Modern Art also had a can… and that some of the cans had exploded.