Streaming services might be convenient, but in an age where there's no guarantee that films will always be accessible on them, purchasing a few Criterion Collection Blu-rays adds some cinematic security to your home. Right now, you can save big on these films, as Amazon and Barnes & Noble are offering 50% discounts on these cinematic treasures. It's worth noting that Amazon is still adding to its deals, while Barnes & Noble will offer everything in its online inventory of Criterion Collection films at 50% off. Amazon isn't likely to match all of Barnes & Noble's deals, but this promotion--which typically runs at least once each year--is the best time to pick up Criterion Collection releases.