offers the Mainstays Large Patio Heater for $99. Coupon code "WAREHOUSE30" cuts that to $69.30. With free shipping, that's $21 under our June mention and the lowest price we've seen. (It's the best deal now by $66.) This 7-foot heater provides up to 40,000 BTUs of heat and features a lifting cylinder housing, thermocouple and anti-tilt safety devices, and wheels. Deal ends September 10.