The Dark Knight (Two-Disc Special Edition) (2008) for $5.72

The Dark Knight arrives with tremendous hype (best superhero movie ever posthumous Oscar for Heath Ledger), and incredibly, it lives up to all of it. But calling it the best superhero movie ever seems like faint praise, since part of what makes the movie great--in addition to pitch-perfect casting, outstanding writing, and a compelling vision--is that it bypasses the normal fantasy element of the superhero genre and makes it all terrifyingly real.