It's /toy/'s first Christmas so let's have a look at where you can order from. I myself am looking for more japanese sites stocking Souchaku Henshin/Figuarts that offer AIR shipping(I'd recommend AIR for holiday shopping), but here's what I know:

http://www.hobbylinkjapan.com/

The widest known, the main advantage is the variety in stock.

http://www.1999.co.jp/eng/

Hobby search, they're mostly focused moe~ statues and figures(like Figma) but because of that you can sometimes find other figures

http://www.angolz.com

Offers AIR shipping. Great place to pick up the excellent Dragon Ball Hybrid Figures, recommend them, you can get some of the more popular ones even for $9 a pop. Also good for Busou Shinki.

http://www.japan-toys.com/