Amazon offer the Aromatherapy Oil Diffuser priced at $39.99, then use promo code "569CNNXF" at checkout, price will drop to $29.99. Prime members qualify for free shipping. Go here
It features eight colors, three mist modes, and an operating time of up to eight hours. Deal ends October 15.
As an idea, if your not a prime member, as a filler just to qualify for free shipping add on the Salem's Lot Blu-ray and you'll be set!