Costco is one of those stores that really seem to have everything. You walk into the sprawling warehouse, and the world is your oyster: Want a flat screen television? Right this way! How about a whole beef tenderloin? Just around that corner, sir! Need a new pair of glasses? No? Well, they’re there if you change your mind. How about a cheap, massive slice of pizza? But while it may seem like there’s no better store to get great value for your money, there are some items that you’d be better off purchasing elsewhere.