A slew of Atlus titles for the PSP are getting a discount for what they are dubbing the "reVITAlized" event.
Other titles seeing a 33% cut or more are:
Riviera: The Promised Land
Nights in the Nightmare
Kenka Bancho Badass Rumble
Crimson Gem Saga
Class of Heroes
As you can see in the image from my email above, there is no indication if this will be a permanent drop or a temporary one, and that the prices are valid for North America only.