Graham Nash is putting 19 of his guitars into a Heritage Auctions sale, including the Martin-D45 acoustic guitar he played on stage with CSN&Y at Woodstock. Other instruments of note from Graham's collection that are going up for bids at the July 21-22 sale inlude a Gibson SG Duane Allman played in the 1960's, a 1963 Gibson J-180 once owned by Don Everly and a pair of guitars that both Johnny Cash and Stephen Stills both once owned.