3 eBay/Amazon/Locally Used
If refurbished is still a little too pricey, you may want to check deals on used iPhones online and locally. There are lots of sites that sell used iPhones. Amazon and eBay are probably the most popular. You can also find used iPhones at reseller sites such as Gazelle, Swappa, and Glyde. These sites all offer used iPhones at reasonably low prices.
For comparison, buying used on eBay can save you about $100-$150, and there are even many refurbished options from sellers generally saving you upwards of $50. Amazon offers a smaller, similar selection and is comparable in savings.
Sites like Swappa can save you around $100 on your next iPhone, while Gazelle and Glyde have some options that are discounted by more than $200. Another option is checking your local classifieds such as Craigslist or Facebook Marketplace to purchase from a seller in your area.
Always remember to be careful when selling locally and online. Meet in safe areas and try to avoid scams. Some police departments have SafeTrade Stations to help keep you safe.