Going forward, the iPhone 6, 6 Plus, and 5s will only be available for purchase in Space Gray or Silver, reserving the Gold and Rose Gold colors for the company's new flagship iPhones. Apple has confirmed to The Verge that the gold color options are no longer available for older iPhones.

With the launch of the iPhone 6s and the iPhone 6s Plus, Apple has dropped the prices on the iPhone 6 and the iPhone 6s by $100. The iPhone 6 now starts at $549 for the 16GB model, while the iPhone 6s starts at $649. The two iPhones are also no longer sold in 128GB capacities.
The iPhone 5s is also still available for sale as Apple's low-priced iPhone option, purchasable in a 16GB configuration for $0 with a two-year contract or $49 for 32GB. With the iPhone 5s representing the lower-end of the iPhone lineup, the colorful iPhone 5c has been discontinued.