Chex cereals are on sale at Walmarts right now for $2.00 a box (they're often on sale around the holidays because of the Chex party mixes you can make).
Use a $1/2 coupon and get them for $1.50 a box!
Not the most amazing deal I've seen on cereal, but still pretty darn good, especially for Chex.
Click here to find coupons.
Or google "chex coupons" to find sites to print the coupons from.