I think this is for Gold Members only. Not mentioned as a daily or weekly deal so not sure why it's reduced.
Usually 560 Microsoft Points each - currently 280 Microsoft Points each.
Showing up on Xbox.com & Xbox 360 Dashboard.
There is a free and premium version of both packs. These are obviously the premium versions.
"The Premium Deluge Pack features the complete Deluge co-op arcade mode where you defend the city zones against ever growing waves of Pacific City bad guys. Try it alone or with up to four players on Xbox LIVE for ever more demanding battles. In addition, the premium pack includes new achievements, avatar awards, and the sixteen-player Capture the Orb mode with 6 arenas."
"Expand Crackdown 2 with the Toy Box Pack! It's bursting at the seams with extra toys and treasures, including an expanded Keys to the City mode, the ATV Assault Vehicle, the Squad Chopper, Suit Thrusters, new Agent armor colors, and a Vehicle Tag game, just to name a few. The Toy Box Pack is packed so full it would take a Level 5 Agent to hold it closed!"