VM Innovations offers the Suntec 1,200-sq.-ft. Portable Electric Space Heater in Oak, model no. RC2000, for $85.99. Coupon code "3CWHQN6" cuts it to $69.99. With free shipping, that's the lowest total price we could find by $10, although we saw it for $1 less a year ago. This 1,500-watt heater purports a 20,000-hour lifespan with 5,500 BTU of heat.