Must be 18 years or older to enter. Limited to one online entry per day, per email, and one in-store entry per person, per day, per location visit. Prize to be picked up at Dusterhoft Family Stores Demers store, located at 4315 Demers Ave, Grand Forks, ND 58201. Prize to consist of two free preseason tickets to the August 18th or August 24th game at the U.S. Bank Stadium in Minneapolis, MN. Some restrictions apply. Offer subject to change. No cash value. No cash back. See store for details. By providing your information to Dusterhoft Family Stores, you are opting in to receive future promotions, news updates, or other electronic correspondence.