This coupon has expired $1.00 for Post® Grape Nuts Trail Mix Crunch™ Cereal. Offer available at Walmart. expires on 03/22/18 Other coupons you may be interested in $1.00 for Jarritos (expiring on Monday, 01/02/2023). Offer available at multiple stores. $1.00 for Sangria Senorial (expiring on Monday, 01/02/2023). Offer available at multiple stores.