Well considering subsidies stopped and I got 450 for my two year old iPhone 6+. I put down 400$ of thay towards the 7+. Payments are about 20$ a month. Paying off the phone now would be about 250 and getting 600$ for on eBay will get me much more than trading in the phone. Remember I'm not considering that 400$ I put down as the phone was paid off. How much are your payments with no money down on a 128gig or higher plus phone? I forgot all the details that I figured out when I did this last year but sellling the phone for a good amount and putting. 4-500 down on a phone and repeating every year made more sense than paying 35-40 for a phone payment.