I paid 39$US at Amazon.com (final bill was about 52-53$CAN) for the blu-ray edition. But I think it was during a super special.
I think right now it's around 45$US at amazon.com again, but nowadays they charge a major custom broker premium so I tend to avoid them.

E = ((2M100 + VP180 + 4QS10)/(EP800 + EP500))^(ADA1500 x D2v)