I was able to get a price match at Circuit City for Kung Fu Hustle by printing out the Best Buy web page (since the closest Best Buy to me is 30+ miles away, in a different town, but still close enough for price matching since a lot of people here commute there for work), for $13.xx after taxes. Thanks for the heads up OP!
I did stop by at my local BB today, and they were selling these 3 titles in the store at $13.99 each. "Black Hawk Down," however, was not in stock; but I did pick up the other 2 at that price . . . a pretty good deal for Best Buy.