Sotheby's London will soon be auctioning off a newly discovered personal copy of Gustav Mahler's Third Symphony from 1902. Click here to see the full announcement and view a copy of one of the pages of the score with its extensive alterations and performance markings, vividly amended in coloured ink, crayons and pencil. Do you think it will sell at or near its estimate of $145,000 - $215,000?