$1,049,465,009

February 9 2016

Image of $1,049,465,009

Picture: New Yorker

That's the amount a Russian billionaire, Dmitry Rybolovlev (above) claims that his one time art agent, Yves Bouvier, overcharged him on art deals. Bouvier claims he was merely being 'clever', which is one way of describing an alleged mark-up of about $50m on the sale of Leonardo's Salvator Mundi. Others might call it a con. Sam Knight has an excellent account of the saga in The New Yorker.