This item is not sold in amazon(USA),
but you can get it via amazon.jp.
There is more information in detail with links in those pictures.
You can buy them with the links. (ref how to buy with amazon.jp)
Calculating the price in US dollar quickly, divide the yen(or JPY,円,Y with two hoｒizontal lines) with 100.
I think, buying Japanese anime goods with amazon.jp is the best way,
considering the price and quality.