I don't think there are any other active coupons for Barnes & Noble at the moment. Pretty sure their Criterion sale ends today too.
I went to a different store on Sunday and picked up The Royal Tenenbaums for $13.99.
Also, if you're using Best Buy, be sure to check your Reward Zone account. They sent me a free $5 certificate good through 12/24. I already used mine over the weekend, but that would bring a lot of these down to $12.99.