Sears offers the NFL 1,200-watt Infrared Helmet Space Heater in New England Patriots (pictured), Chicago Bears, Dallas Cowboys, Green Bay Packers, New York Giants, or New York Jets, model no. LW-NFL, for $79.97 with free shipping. (Groupon offers it for the same.) That's the lowest total price we could find for the helmet in any team style by $60. It features a high/low switch for 1,200-watt or 600-watt output, heats 400 to 800 square feet, and measures 16.5" x 14" x 13".
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.