Julang via Amazon offers the Paxamo 600ml Ultrasonic Wood Grain Essential Oil Diffuser in Dark or Light for $35.99. Coupon code "2T4Q6VIA" cuts that to $18.71. With free shipping, that's $9 less than our September mention, $25 off list, and the lowest price we could find. It covers areas up to 400 square feet. Deal ends December 31.