Amazon has the 5-Pack of Air Wick Scented Oil Plug-In Essential Oils Air Freshener (Lavender and Chamomile) for $11.38 - $5.76 off coupon (check "Apply Coupon") - 5% off with Subscribe & Save (cancel anytime) = $5.62 with free shipping on $35+ or with Prime (extra 15% off for 5+ subscribe and save orders).