A previously lost 12-string acoustic guitar that belonged to the late John Lennon will go up for sale at an auction in May after it was recently found in the attic of a home in Britain. The auctioneers said Lennon played the guitar, which is expected to exceed its estimate of $600,000 to $800,000, on the Beatles' 1965 album "Help!". The guitar was lying in an attic and was rediscovered ...