User blog comment:Jimeee/Dragonborn coming to PS3 and PC in February/@comment-208.106.85.77-20130125154728/@comment-5046408-20130125162748

In lieu of the Xbox and PC releases, I'd say full price for the DLCs will be $19.99 for Dawnguard and Dragonborn, $4.99 for Hearthfire.