VM Innovations via eBay offers the Dr. Infrared 5,600-watt Space Heater, model no. DR-988, for $94.99 with free shipping. That's $5 under our October mention and the lowest total price we've seen. (It's a current low by $15.) It heats up to 600 square feet and features thermostat control and auto overheat cutoff protection.

Note: This item requires a 208- to 240-volt outlet rather than the standard 120-volt household outlet.