I'm a little bit surprised that this is the going rate. I would have thought that Blizzard would at least make a SC2 + expansion bundle for $60 as the deal. I wonder if they're hurting? Either that or their just trying to squeeze out as much money as possible, without thinking about how such drops affect people's buying decisions for new games.
Blizzard is offering that bundle. Only you have to order through Battle.net to get the deal.