Beck has gone on record to say that he didn't really trade the Yardbirds Esquire and clearly feels he should get it back. SD continues to tell his side of the story and retains ownership of it. A number of guitars were swapped, loaned, left at gigs and peoples houses, repaired, traded and given to friends that went through SD and JB's hands.
When I was hanging out with SD at the Dallas Guitar Show he had brought along the Yardbirds Esquire and let me play it in his hotel room. Very good guitar but it was Jeff Beck's talent/playing that made that guitar special.