Earlier this week this new Mail-in-Rebate offer for FREE Ground Beef when you buy 3 boxes of Hamburger Helper! This rebate offer is valid for up to $8.06 in savings.  Combine this rebate offer with Walmart's rollback price and you've got a great deal: Hamburger Helper, $1.35 ea. Ground Beef (2 lb.), $7.94 ea. Mail-in-Rebate [...]