A 1963 Martin D-28 guitar that Bob Dylan played during George Harrison's Bangladesh benefit concert and used extensively during his Rolling Thunder Revue tour is being put up for bids by Heritage Auctions in Dallas on November 11. The instrument was bought from Dylan for $500 by a guitar tech in 1977. The receipt from that transaction also goes to the high bidder. Larry Cragg says the guitar hasn't been played since he got it and nothing on it has been replaced. He has kept it in a humidity and temperature controlled enclosure.