The lowest Amazon went was $57 (and it's now at $60). Target has it for $50 according to SuperJedi's post. Both have the $10 offer, but Target's price is better, including tax.
I'm sticking with Amazon, though. Love me some delivery to my door on release day.
If anyone has an extra code, I would like one, please. For some reason, I never get these mailings from Amazon and I buy a crap-ton of stuff from them... :(
Just grabbed Prince of Persia (360) for $14.99 as reported at the Target on Arlington Blvd. in Arlington, VA, in case anyone is looking for it. They have several more copies.