There are many benefits to buying a refurbished smartphone. For one, you can often find great deals on top-of-the-line models. Plus, refurbished phones have been thoroughly tested and typically come with a warranty. But where do you find the best deals on refurbished smartphones? We've rounded up a few of our favorite places to score a deal below.1. Gazelle: Gazelle is one of the largest online retailers of certified pre-owned devices. They carry everything from iPhones to Galaxy phones, and you can often find great deals on top-of-the-line models.2. Amazon Renewed: Amazon Renewed is Amazon's official store for refurbished electronics. All devices sold through Amazon Renewed are backed by Amazon's standard return policy, so you can feel confident about your purchase.3. Best Buy: Best Buy is another great option for finding refurbished smartphones.