Thoughts on “bargain” grocery stores?

There is a bargain grocery store in my town. It doesn’t offer anything fresh, but lots of pantry items for WAY less than the store (e.g., high end chocolate bars for $2, 3 bags of brand name chips for a total of $3, etc.).

I can’t see the flaw in shopping here for just about everything. Sometimes I’m paranoid about pantry moths, so I tend not to buy grains or things that can easily be contaminated.

Any other thoughts or tips?