It depends. You can't get Souveran in stores and you can't get Klasse off the shelf easily either. Lots of products can be purchased at local stores. Things like Prestone carpet cleaner I buy in bulk but I can get that in a store. Invisible Glass is available localy but I buy that in bulk. Just about anything you can get in AutoZone you can buy in bulk if you need to. You really need to shop in both places. I don't think there is anything you can get at AutoZone that you can't get online. So the trick is to find an online store that sells the products you use most. That way you can just get them all at once and not waste time shopping around. If a couple of my favorite stores would carry 3 or 4 more products that I have to get localy then I'd never need to go to Checker or AutoZone or PepBoys again. I could avoid the car care aisle at Target and WalMart unless someone spots a sale on something good. My life would suddenly be easier. lol