Actually, the weeks preceeding Black Friday had these "Savestation" titles at $5 off if you bought two. Therefore, when you bought two of them on BF ($5.99 each) you saved an additional $5 ($2.50 off each) knocking them down to $3.49 each. They have now changed that sale to B1G1 free which is a little better (as long as the sales prices stay in effect).So I think this was glitching out during black friday. For some reason when I bought Underworld and Life they both dropped to $3.50 each (wasn't complaining). I couldn't figure out why. I think it's because this sale was "live" in some sense.
Unfortunately the main movie I'd want to take advantage of this with is out of stock.