Note to self. Don't lose them.
I want the IPhone 7, but I think I will wait to see how it pans out. My IPhone 6 is still working well. In fact, so is my Iphone 5. We shall see. I know Viber works well on it. But then again, Viber works well on my wife's Globe Cloudphone too. 😀
We have a local website (KSL.com) that has a free classified section. Every year, my wife and I alternate selling our iPhone and upgrade. We are each on the 2 year renew cycle through Verizon.
Each time, we get ~$250 for our 2 year old iPhone. So we put that towards the $199 upgrade, usually we buy the max memory option and this year I am going for the iPhone 7 Plus. Which means I sell my old iPhone and have to pony up only $150 to get the top of the line iPhone 7 plus.
I don’t know why you keep your old iPhones? I mean, do what you will, they are yours to do with as you will. But they have significant although diminished value over time.