Walmart has Special K on for $2.97 box and you need to buy 2 boxes to get this deal.
Here's the breakdown:
Buy 2 boxes of Special K for $2.97 each
Use 2 $1 off coupons (you can find these on tearpads at many stores)
Upload your receipt to Checkout 51 and get $1.50 added to your account for buyin 2 boxes
Upload your receipt to Save.ca and get $1 back
I LOVE this cereal, so this was a happy find!