There must be some sort of sale going on, since this, Dragon Quest IV, Valkyrie Profile DS, and Deathsmiles are all suddenly around 60% off, but I can't find the main page for it.
http://www.amazon.com/Valkyria-Chronicles-Playstation-3/dp/B0016C3260/
http://www.amazon.com/Valkyria-Chronicles-Playstation-3/dp/B0016C3260/