Groupon discounts a selection of refurbished unlocked Apple iPhone 6s or 6s Plus GSM smartphones, with prices starting at $419.99, as listed below. Plus, all orders bag free shipping. That's up to $204 under what you'd pay for new versions of these phones and represents all-time lows for each of these phones with no contract. Each phone comes with an MFI-certified Lightning cable and non-OEM power adapter. Note that these phones will not work on Verizon or Sprint networks. Deal ends November 26. The deals, with prices compared to new units: No warranty information is provided. These items will have some cosmetic imperfections and will arrive in bulk packaging.