I've been considering a move to iOS for a long time now. I'm currently on a Lumia 1520 Windows phone and have been for a long time. Prior to that, I was on Android. I like the Lumia camera but other than that, Windows Phone OS has been in semi-beta (if not officially) status for years and now they're doing yet another OS rewrite for phones which will only increase bugs and make things even less stable. The already limited app selection will suffer as many developers will neglect to update their already out-of-date apps for the new OS. So I'm ready to jump ship and I like everything about the iPhone with the exception of the price. I'm on T-Mobile and have been eying the 64 GB iPhone 6 Plus but I just can't justify spending $850, even if it is spread out over 2 years. I've looked at AT&T, Verizon, and Sprint and have determined that it would cost even more to go with any of them. I'm not committed to staying with T-Mobile but they still seem to be the cheapest when considering both the cost of the phone and the monthly plan. My question is, when (if ever) would be the best time to move to an iPhone in terms of device cost? Are prior-year models discounted when new models (like the 6s) are announced? Are there any seasonal sales that I should hold off for? Even used iPhones on Ebay seem to be selling for neae MSRP. Thanks!