The autograph of Gustav Mahler's second symphony (Resurrection) was auctioned yesterday at Sotheby's for a sum of 4,546,250 GBP (about $5,670,000). This is the highest price ever payed for a music autograph.

The handwritten 232-page manuscript was owned by US businessman Gilbert Kaplan, who died earlier this year. He became obsessed with the work, and dedicated his life to conducting it before his death.

source: http://www.sothebys.com/en/auctions/ecatalogue/2016/music-continental-bo...