I just called Best Buy and the sale is good through midnight on Saturday, providing that there is still stock within the stores. This means, yes, if you go to the store on Saturday and it's still available, you will get it for $6.99. This is true for all Baltimore/DC/NOVA locations. Actually, if I remember correctly, nationwide.
You're welcome.
I've had a burn of the promo since mid Sept., which means it's time for me to schlep my butt out and buy myself a copy.