On February 5th, Sotheby’s will offer Salvador Dali’s portrait of international socialite Mona Bismarck as part of their Modern Art auction.  The painting will look to follow the recent spike in auction prices for Dali’s work, and is forecasted to sell at $2.41 to $3.21 million.  Samuel Valette, a specialist at Sotheby’s, calls the estimate for “Portrait of Mrs. Harrison Williams” “a fair estimate that leaves room for excitement.” (more…)