Select store pickup
Link
In order to get this for $1 cheaper than posted sale price, make sure that you are on Best Buy’s mobile site (not app). Add the movie to cart, in cart select "shipping" first then click checkout. On the following page you will see an option to select store pickup for an additional $1 off.
If you are on a desktop computer, scroll all the way down and select mobile site on the bottom left of the site and search for the movie and follow the same steps mentioned above.