So I called the number that cconely lists. I explained that I had seen this price earlier in the day, but I was in the car driving home from vacation (which is true), and by the time I got home, the price was gone. The CSR looked up a note and explained that the price was an error, and he apologized for the confusion. I asked him, please to honor the price. He put me on hold, saying he was going to check with a supervisor. He came back on the line and said they would honor the price on two cards for me.
Thanks cconely and all for this great heads up!