The cheapest I've found it for is $52.99 at game stop.
there's a thread for it on the front of the forums. But anyways the coupon code for gamestop is "DEALTASTIC" (without the quotes).
It expires soon though 1/25 at 11 am.
Amazon has it for 54 or 55 and ten dollar future credit.
Best deals I've found. If you find better let me know.