As the title says, another one of these HD collections for only $15. However, they do charge shipping and it comes to be around $21.94 for the cheapest alternative.
Link: http://store.na.square-enix.com/store/sqenixus/en_US/pd/productID.227248400
Link: http://store.na.square-enix.com/store/sqenixus/en_US/pd/productID.227248400