Trader Joe’s has a small selection of very reasonably priced spices including several used in my spice blends in The Foodie Bar Way.
Trader Joe’s sells unfiltered, organic, apple cider vinegar, perfect for use in the Salad Dressing Foodie Bar and many recipes in The Foodie Bar Way cookbook.
Trader Joe’s sells reduced sodium soy sauce. Don’t forget that you can purchase “regular” soy sauce and simply dilute it with water.
Trader Joe’s sells a variety of balsamic vinegars. I have not yet tried them all, as I tend to stick with my favorite (Kirkland).
I use apple cider vinegar in a lot of the dressings that I make for myself. I haven’t noticed a big difference in flavor among various brands.