I wonder what the prices are going to be in North America ? If it is the same price that would be $10.12 Canadian for 3 cards; but if they are priced the same as japan (300 yen for 3) it would only be $3.17. but knowing how the prices work it will most likely be around 7$ for 3 but that is just my guess.
Remember that they're going to be sold in packs of 6 cards here, not three, so that throws it off a bit.