The Hobbit: An Unexpected Journey is now officially out on Blu-ray and DVD. The movie comes in three main sku's of 3D Blu-ray Combo Pack (BR 3D + BR + DVD + Digital Copy), Blu-ray Combo Pack (BR + DVD + Digital Copy), and DVD (DVD + Digital Copy). Some stores have exclusive extra content. Below are the prices on top five stores but feel free to add more in the comments. From what I can tell the exclusive content is limited to the Blu-ray Combo Pack.

Amazon
3D Blu-ray Combo Pack - $27.99
Blu-ray Combo Pack - $25.99
DVD - $14.99
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The Hobbit: An Unexpected Journey Out Now on Blu-ray and DVD. There are any The Hobbit: An Unexpected Journey Out Now on Blu-ray and DVD in here.