Hate to break it to you, but Humble Bundle had it at 12.99 for their monthly deal a while ago (probably not DLC, so you probably still got a good deal).
Only two games interest me:
Mass Effect 2 (Not sure if I buy the hype about it though)
C&C red alert 3 (In my mind it must be strictly better than command and conquer 2 because it's 1 higher?)
4.99 each at the moment.