The most valuable and highly prized first and second state 'butcher covers' are those that were never opened and remain still sealed in their original shrink-wrap. Since the first documented collector's sale of a mono "butcher cover" LP in 1974, which fetched US$457.00, the value of first state mono versions has consistently appreciated, reaching $20,000 in 2006. In 1987, Alan Livingston released for sale 24 "first state" butcher covers from his private collection. When the original cover was scrapped in June 1966, Livingston took a case of already-sealed 'butcher cover' albums from the warehouse before they were to be pasted over with the new covers, and kept them in a closet at his home. These albums were first offered for sale at a Beatlefest convention at the Marriott Hotel near Los Angeles International Airport on Thanksgiving weekend 1987 by Livingston's son. These still-sealed pristine items, which included nineteen mono and five stereo versions, are the very rarest and most valuable 'butcher covers' in existence. These so-called "Livingston Butchers" today command premium prices among collectors, the five stereo versions being the most rare and valuable of these. In April 2006, Heritage Auction Galleries sold one of the sealed mono "Livingston Butchers" at auction in Dallas for close to $39,000. An extremely rare original "first state" stereo copy that was not from the Livingston collection was presented for appraisal at a 2003 Chicago taping of the PBS series Antiques Roadshow. It was still in the possession of the original owner, who had bought it at Sears & Roebuck on the day of release in 1966 – the only day that the original 'butcher cover' versions were on sale before being recalled by Capitol. Although not in its original shrink-wrap, it had rarely been played and was still in excellent condition, and Roadshow appraiser Gary Sohmers valued it at US$10,000–$12,000. In 2016, a mint condition "first state" stereo copy of Yesterday and Today in shrink-wrap was sold for $125,000. CD release Leonard writes that the album was "beloved by fans at the time", yet it became "lost for decades after the transition to digital music" and notable instead for the 'butcher cover' episode. Yesterday and Today received its first release on compact disc in 2014, individually and as part of the Beatles' box set The U.S. Albums. Mixes included on the mono/stereo 2014 CD differ from the original North American LP releases. "Drive