They didn't have the combo of Black Swan at the Target in my area either (do I smell a conspiracy?). The price was the same on the regular Blu-ray and since I have no real need for the extra DVD, I just picked that up.
Big week for me. I'll be getting the three Scream movies, Black Swan and Mad Men on Blu-ray. I'll hold off on Treme until it goes on sale. Thanks for the prices!