A late self-portrait by “pope of pop” Andy Warhol sold for a record $32.5 million at Sotheby's in New York Wednesday, underlining the return of big spenders to the international art market. The stark 1986 image of Warhol's famous face and unkempt hair was estimated to sell at between 10-15 million at the contemporary art auction. The huge final sale value was in line with the strong demand for Warhols shown at the spring contemporary art auction at rival Christie's in Manhattan on Tuesday. The Sotheby's sale was the highest price paid for a self-portrait by the iconoclastic artist, who died a year after the work was completed.