Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
Marcel Duchamp of prominent artists and art historians voted "Fountain" "the most influential artwork of the 20th century". 17 November 1999, a version of "Fountain" (owned by Arturo Schwarz) was sold at Sotheby's, New York, for $1,762,500 to Dimitris Daskalopoulos, who declared that "Fountain" represented the origin of contemporary art. The price set a world record, at the time, for a work by Marcel Duchamp at public auction. The record has since been surpassed by a work sold at Christie's Paris, titled "Belle Haleine, Eau de Voilette" (1921). The readymade of a perfume bottle in its box sold for a record $11.5