Northern Tool continues to offer the Mr. Heater 18,000-BTU Big Buddy Propane Heater bundled with a $10 Northern Tool Gift Card for $107.99. Coupon code "255830" drops the price to $87.99. Opt for in-store pickup to dodge the $14.99 shipping fee. Assuming you'll use the gift card, that's $20 under last month's mention and the lowest price we've seen. (It's the best deal today by $35.) It's designed to heat an area up to 400 square feet. Deal ends November 22.