Hey I was looking around for some ketchup and found this:
Heinz Tomato Ketchup, 40-Ounce Bottles (Pack of 4) for $9.19 with Subscribe
& SaveLink: http://www.amazon.com/Heinz-Tomato-Ketchup-40-Ounce-Bottles/dp/
Not an amazing price, but decent with free shipping from Amazon.
Works out to about $0.06/oz.