Trader Joes is MORE expensive for the things I use personally, or they don't stock them at all, so I rarely go. Flour, baking ingredients, raw nuts, bread, pasta, coconut milk, asian ingredients are more expensive. They don't have coconut oil or soymilk powder or raw sunflower seeds or Walla Walla Sweet onions, or sesame oil or nutritional yeast. I don't ever use pre-packaged mixes, sauces or ingredient blends, so 90% of their frozen, canned and jarred foods are useless to me.
They ARE cheaper for Vegenaise, soymilk, Earth Balance and Morningstar Farms. Which makes them worth a trip about once every 4 months since I rarely use these products.