Head over to Coupons.com and print the $3.99/1 Purex Crystal coupon (expires 12/1). You can then go to Wal-Mart and grab your cheap Purex Crystals when you buy 3. SWEET!!!
Walmart Deal, through 12/1
Buy 1 Purex Crystals – $2.97
Use (1 ) Buy 2 get 1 free 18 oz. Purex® Cyrstals™ In-Wash Fragrance Booster
Final Price: $1.98 each