Another purchase site would be YesAsia, just so you know. And they include free shipping in their preorders..I think, so it's about even pricing. However, they didn't change their expected release date yet, but YesAsia is a known reputable site for asian stuff.
http://www.yesasia.com/us/rewrite-li...0-en/info.html
still not the cheapest, but it's just in case AmiAmi runs out of stock for preorders