VM Innovations offers the Dr. Infrared 5,600-watt Space Heater, model no. DR-988, for $114.99. Coupon code "68C8ANR4" cuts the price to $99.99. With free shipping, that's the lowest total price we could find by $23. Deal ends March 21.
Note that this item requires a 208-240V outlet rather than the standard 120V household outlet.