Katharine, an avid art collector, decided to open a high end gallery to display her collection. Opening was set for March 15. In anticipation of the opening, Katharine purchased 2 paintings by "Renoir" from Northeby's Auction House at an auction on February 20 for a total purchase price of $400,000.00. The works had been advertised in Northeby's catalogue prior to the sale as having a Northeby "expert certified value of $600,000.00". Katharine viewed the paintings prior to the auction and thought they would make an impressive addition to her collection. On February 25, when Katharine's insurance company's appraisers examined the paintings they determined that they were not original "Renoirs" but appeared to be completed by an apprentice of Renoir. They estimated the value to be approximately $200,000.00. Katharine exhibited the "Renoirs" at her opening on March 15 as planned and contacted Northeby's the next day. She offered to return the paintings in exchange for $600,000.00 which was the "expert certified value". Northeby's refused and claimed that they were under no obligation to accept the paintings or return or pay any money. They pointed out that the following clause was on the reverse side of the ticket purchased by Katharine which