Keith Sivyer was a seriously obsessive music fan. Every week from 1952 until his death in 2016, he would go to his local London record shop with a copy of Music Week and buy every new song that entered the Top 40 charts. By the end, his collection contained 27,000 7-inch singles, 6,000 12-inch singles, and 10,000 CD and cassette singles (aka “cassingles”) and it is believed to be the most complete collection in existence, containing every single....single. The entire collection is being auctioned May 16, 2016, so if you'd like to take over the hobby...