Target discounts a selection of Blu-ray movies to $4. Opt for in-store pickup to avoid shipping fees, which start at $4. (You can also spend $25 or more to qualify for free shipping.) That's a solid set of lows, beating many other stores including Amazon. Selected movies include Willy Wonka & the Chocolate Factory (pictured), The Hurt Locker, Romeo + Juliet, and Ender's Game.
Note that many of these titles are available only via in-store pickup.