Free tuna and so-close-to-free shampoo today at Walmart. Gourmet Clover Leaf tuna was roll-backed to $2 at Walmart. Had 1 $1 coupon left, plus CO51 $1 = free! Got a $2.50 Herbal Essences SDM coupon in my email this week. Herbal Essences were roll-backed to $3.38 at Walmart and they took the SDM coupon and it came to $1.05 with taxes (can I say how much I love this Ad-Match policy). Then submitted for CO51 offer and got an additional $1 back, making this shampoo only $0.05!