Autographed guitars are far from a dime a dozen - but they are a lot more common and less valuable than instruments it can be documented were actually played by Rockers during studio sessions or on tour.  Some very unique pieces of gear will go up for bids May 11.  Acquired from EMI studios in Barcelona, the lots include microphones that John Lennon used while recording songs on a number of his early solo albums on, including the one used on Imagine.  The unusual nature of the pieces makes estimating the amount they could bring at auction a bit difficult.  Early estimates were that each could sell for more than $8,000, but one expert on rare instruments hastened to say, '...the sky's the limit' when it comes to items as rare as these pieces.
Independent.co.uk

MORE JOHN LENNON INSIGHTS