1. Spirits
And to top our list, alcohol is the best selling item at Costco. It is no surprise that spirits are so popular as a Costco purchase; afterall, the massive assortment of booze they stock is quite impressive.
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That was our list of 11 best selling products at Costco. Next time you go, make sure to buy some of their poppyseed muffins; that is, if you aren’t too full from trying all of those free samples.
