Meijer is having a promo where when you buy 10 boxes, you get a $10 off your next order catalina coupon. That's like $1 off per box and you can use coupons too! I paid .25 or less per box of cereal!
Kroger is having a 50% off sale on certain cereals (cheerios, lucky charms, cin toast crunch) and Fiber One bars. This sale can also be combined with coupons. Watch out Kroger - here I come!