Best Buy Email Offer: Save $10 TODAY at your local Best Buy store YMMV
I've received an email with the title "Save $10 TODAY at your local Best Buy store" and it contains a coupon for 10 off. It doesn't specify minimum amount, so I guess it can be 10 off 10. It's valid from 11/04/2017 to 11/18/2017.
It can also be redeemed online.