I'm not seeing the comparison here. There are grocery stores where you can get potatoes at a reasonable price, based on the costs involved in growing, shipping, and stocking said potatoes. No, I don't grow my own potatoes, I shop at those stores. The grocery stores that charge more for potatoes are generally the "high end" grocery stores (in my area, Whole Foods, Raleys, Sprouts, etc) and are not doing convenience pricing which is what is being discussed.