Which is more valuable: a John Lennnon & Yoko Ono "Double Fantasy" record autographed by Lennon five hours before Mark David Chapman assassinated him or the single existing copy of The Quarrymen's "That'll be the Day"/"In Spite of All the Danger?" Apparently, the difference is a whopping $345,000 -- Lennon/Ono is valued at $525,000, while The Quarryment is estimated to be worth $180,000. Those two discs top MusicStack's list of the Most Valuable Records, which also includes LPs by the Beatles, Bob Dylan, Velvet Underground and Elvis Presley. Click here to check out the full index.