Kart’s right. The cheapest way to store food is to do it yourself.
I have beans and wheat berries stored in Mylar both bought and packed myself. It was significantly cheaper to do it myself.
If/when I get a green thumb, I’ll add veggies to my stockpile. For now, I buy it dehydrated and store in mason jars with an oxygen absorber. Super easy to do. When I move to a humid area, i’m gonna invest in a vacuum sealer for storing just about everything.
Shopgoodwill.com often has vacuum sealers for cheap. Some are even new in the box.