Best Buy discounts a selection of Blu-ray movies, with prices starting at $9.99. Add any three to your cart and the price drops to $20. Opt for in-store pickup to avoid the $5.99 shipping fee. (Alternatively, orders of $35 or more receive free shipping.) That's a savings of at least $10. Choose from titles such as Whiplash, The Magnificent Seven, and the Men in Black Trilogy.