1. Sellers get about 30% more cash using by back sites like Gazelle or Nextworth versus wireless carriers trade in programs.
One of the best ways to get the highest price is to take advantage of the price locks. You can lock in a price now and wait up to 30 days before you have to send in your phone. - Brain Morries
2. You can make good money by selling in person via Craigslist, Facebook, or apps like LetGo or OfferUp. Just be cautious of scammers.
3. eBay is a great option since loads of people will see your offer. eBay's Quick Sale can sell it for you, but you'll only make an average profit.
4. Trading back to Apple is simple and gives you Apple Store credit. But they only accept older models, and you won't get the best price.
5. Sell before a new iPhone hits shelves. "The sooner you sell, the better, because prices can actually drop 15-40 percent surrounding a flagship launch. - Brain Morris.
However you sell your old iPhone, be honest about the condition. Take photos of accessories, manuals and the original box to gain top dollar. Before saying goodbye, back up, save and then revert your old iPhone to its factory settings.
