Stock up on M&M’s holiday candies with a $1.00 coupon for Mars holiday products. It’s available again! I bought two boxes of M&M's at Walmart. Each box is regularly $1.00. After the $1.00 coupon, I paid just $0.50 each. These are awesome stocking stuffers! There is also a $1.00/2 newspaper coupon in the 11/22 Red Plum insert.