as far as "national" chains go, Costco is pretty good if you have space to buy things in bulk. You can stock up on essentials that last forever, and if you have freezer space you can save a ton on various food products by purchasing bulk and freezing. They also have some pretty killer deals on electronics and other stuff. Yes it's membership based, but it's not too hard to get your value out of that if most of what you buy and use is from Costco.