Quick personal question: How's your bank account doing? If you're like me, it's about to do a lot worse. The Criterion Collection just announced a half-off flash sale -- for the next 24 hours, every single title in print is 50% off, making their peerless slate of influential, incredible films that much more affordable. Their library is overwhelming -- if I could, I would click "buy all" and be on my way. But if you're looking for a little more prudence in what to spend and what to buy, here are 10 essential titles from the Criterion …