Look for Deals & Lock In a Trade-in Price
Trade-in values will fluctuate so the sooner you lock in a price the better. Remember, locking in a trade doesn’t mean you need to go through with it.
Apple and many of its partners are offering iPhone trade-in deals and you should investigate those before you commit to buying a new iPhone at full price.
Keep in mind that you'll need a phone in pristine condition if you want to get the maximum amount back for your device. That's why you'll probably want to shop around.
Unfortunately, we won't see straight price cuts on the new iPhone models for a few weeks at least. If you don't have a device in good condition to trade-in, and you don't want to pay full price, you might want to wait for Black Friday or, in some cases, until 2020.