All so called 'survival food' is over priced. You want food you can depend on to know the quality and how it was prepared is to do it your self.

Learn how to home can food. Buy a dehydrator and dry some food. Learn how to slaughter and dress animals. Farmers have been doing this for centuries and have always survived.

Then learn how to reload ammo. Learn how radio works. (This is MY weakness!). Got a bicycle? This is how the Viet Cong moved TONS of supplies!