Buy: Cheese
The cheese aisle at Costco is heaven for cheese lovers. There is a huge variety, and it is priced fairly as well. With only $20, you can get enough cheese to last 3 or 4 dinner parties. What an amazing deal!
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Skip: Signature gas grill
You should not get a gas grill from Costco just because it goes for half the price of a Weber grill. For one, people said that it is nowhere near as sturdy. It is also hard to get replacement parts when needed!