The Elder Scrolls V: Skyrim will have its downloadable content available at half price until April 1, meaning you can snag Dawnguard and Dragonborn for ten bucks apiece. Rather, you can get them for 800 Microsoft Points, as this is part of Xbox Live's seasonal sale.
As well as the two expansion campaigns, you can also nab Hearthfire for 200 MS Points ($2.50).
Good news for those who waited. Sucks if you bought any of this last week. Did any of you buy this stuff last week? We'd love to hear from you.