© Licensed to London News Pictures. 25/11/2011, London, UK. A Bonhams member of staff walks throughout the print room. Preview of Bonhams print sale today 25 November 2011. 'Single dollar' works by Andy Warhol feature in Bonhams' print sale which is being hung for viewing. The signed prints, estimated at between £15,000- 20,000, represent the link Warhol often made between art and money, underlined by the high prices paid for them by collectors at the time and ever since. Photo credit : Stephen Simpson/LNP
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