but does that apply to liquor, too? Absolutely it does, and on average, Costco sells alcohol at only between a 10% and 14% markup. That only means something when it's in the context of what you'll ...

So, how does Costco pull it all off ... one massive secret is that you may not need it. Well, if you're buying Kirkland liquor, that is. In certain states, you don't need a Costco membership ...