Here is a buy two get one free coupon for Renuzit adjustable air fresheners. The price for each freshener is $0.97 at Walmart. Buy two and pay $1.94. The third will be free!

Use one B2G1 FREERenuzit Adjustables Air Freshener Cones, 1 ct, up to $1.18 (coupons.com)

Final Price: $0.65 each, when you buy 3