Malt-O-Meal has a bunch of $1 coupons available online, and Walmart has the bags of this cereal available for $1.  This may not be valid at all stores, but there are many reports of them having this at that price. Here are the coupons:
http://www.malt-o-meal.com/email-blast/Thankyou/landing-page.html?Source=email2

http://www.malt-o-meal.com/walmart/

http://www.malt-o-meal.com/pages/special-offers/special-offers.php

http://www.malt-o-meal.com/cereal-central/become-a-member/become-a-member.asp?id=1

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