Best Buy offers the Pure Guardian 1.3-Gallon Ultrasonic Humidifier, model no. H7550, for $109.99 with free shipping. (This price will show at check-out. Amazon has it for the same price.) That's the lowest total price we could find by $10. It features a 250-sq. ft. humidifying capacity, night light, fungal and mold treatment in water tank, and Ultrasonic technology.