This is why the 3 disc is at $34.94
Disc 1:
New 2005 "Ultra Resolution" digital master from restored film elements
New commentary by historian John Fricke with selected archival audio comments by Barbara Freed-Saltzman (daughter of Arthur Freed), Margaret Hamilton, Ray Bolger, Jack Haley, Ken Darby orchestral and vocal arranger), John Lahr (son of Bert Lahr), Jane Lahr (daughter of Bert Lahr), Hamilton Meserve (son of Margaret Hamilton), William Tuttle (make-up artist), Buddy Ebsen(The original Tin Man), Mervyn LeRoy, John Lee Mahin and Jerry Maren
Prettier Than Ever: The Restoration of Oz
We Haven't Really Met Properly...supporting cast profile gallery, narrated by Angela Lansbury
The Wonderful Wizard of Oz storybook, read by Angela Lansbury
Theatrical trailer gallery
5.1 Dolby Digital soundtrack
Original mono and music-and-effects-only audio tracks
Languages: English (Both Dolby 5.1 & original mono) & French
Subtitles: English, French and Spanish (feature film only)
Disc 2:
Documentaries on the movie's creation and impact:
The Wonderful Wizard of Oz: The Making of a Movie Classic hosted by Angela Lansbury and Memories of Oz -- two original TV specials
All-New: The Art of Imagination: A Tribute to Oz, Because of the Wonderful Things it Does: The Legacy of Oz
Harold Arlen's onset home videos
Outtakes and deleted scenes
It's a Twister! It's a Twister! The tornado special effects tests
Vintage vault featurettes
Extensive stills gallery
More than six hours of audio-only treasures, including an "Oz jukebox" of recording session materials, radio shows and promos
Disc 3:
Four hours devoted to Oz creator L. Frank Baum, who published his first Oz book in 1900.
New documentary L. Frank Baum: The Man Behind the Curtain
Pre-1939 versions of Oz on screen
The Wizard of Oz (1910)
The Magic Cloak of Oz (1914)
His Majesty, The Scarecrow of Oz (1914)
The Wizard of Oz (1925): restored silent version featuring Oliver Hardy and Larry Semon, with a new, fully orchestrated score by Robert Israel
The Wizard of Oz (1933 Cartoon)
Some other bonuses include print reproductions of:
The Wizard of Oz Comes to Life
Eight-page Grauman's Chinese Theatre Souvenir Premiere Program from August 15, 1939
Studio's Invitation to The Grauman's Premiere and the envelope that included tickets to the original Opening Night -- with a newly designed commemorative ticket
Metro-Goldwyn-Mayer Studio News
Sixteen-page edition of the studio's internal "house organ" newspaper, celebrating the release of The Wizard of Oz for the week of August 14, 1939
Photoplay Studies
Rare secondary-education study guide to the film -- Volume V, Number 12 (circa August 1939) -- completely devoted to The Wizard of Oz, with articles revealing surprising insights from its producer, director, cameraman and scenarists.
Deluxe Collectors' Portfolio
Reproductions of original 1939 Kodachrome publicity stills, including nine portraits and on set photographs.