Amazon offers the Glade Air Freshener Plugins Scented Oil Warmer 2-Pack, model no. 880859, for $1.71 with free shipping via the steps below. That's about a buck under what you could expect to pay at a local store. Fragrances are sold separately, although we saw it for slightly less in October. To get the deal:
  1. View the Glade Air Freshener Plugins Scented Oil Warmer 2-Pack for $2.28
  2. clip the 20% off coupon
  3. order via Subscribe & Save for a final price of $1.71
Note: Be sure to cancel Subscribe & Save after receiving the item to avoid being billed for future shipments.