5. Tech gadgets: Buying a used tech item instead of a brand new one can save you a huge sum of money. But before doing that, you need to make sure you’re getting a full warranty with that used item as you would on a brand new model. Amazon Warehouse is great for used tech items! You can find open-box items like tablets and laptops that have been returned, used, damaged in a warehouse, or refurbished. Under “Buying Options,” Amazon sorts by conditions, so you can tell if the item is in good condition or not.