go to the customer service desk and tell them that you were told by a friend that their Sam's club has the drives for $56.91.
I got the last one at Champaign by doing this, it was a returned unopened drive, and they had a price of $74.91 on it. I told the manager that my friend in Chicago (I live in Champaign, IL) had told me about the $56 price in one of the sam's clubs there, she spent about 10 min looking at a computer screen (checking other stores' inventory/prices?) to see if I was lieing to her, then gave me the drive for $56.91
by the way, I got the last drive at the Champagin Sam's Club (thanks to whoever returned it)