It's Dragon Age Monday on Steam, part of the EA Week promotion, and thus both Dragon Age: Origins and Dragon Age II are on sale.
Dragon Age: Origins, Awakening and the Ultimate Edition are on sale for 50 percent off their usual prices. Dragon Age II is on sale for 25 percent off.
EA Week will last until Sunday, with a new deal hitting on a daily basis. Be sure to check it out for some good discounts.