Their weekly special this week is the Japanese version of Rockman Zero 2 (aka Mega Man Zero 2) for GBA - $9.99. Pretty good deal. GBA games can be played on any region system, and being a platformer, it's relatively import-friendly. You can always use a FAQ if you want to know what's going on with the story.
http://www.play-asia.com/SOap-23-83-vu9-71-39-49-en-84-j-70-2cd.html
http://www.play-asia.com/SOap-23-83-vu9-71-39-49-en-84-j-70-2cd.html