On Amazon, looks like I can get an Apple certified refurbished iPhone 6S 64GB at approx. USD 293 While here in my country the new iPhone 8 64GB sold at approx. USD 612 after a local special sales. In both cases they are fully unlocked. What do you think? I have confidence for Amazon and "Apple certified", however, I am thinking if iPhone 6S could run the newest iOS smoothly or not. What do you think? Yes, the question is all about money and if it's worth. I personally don't want to spend 600 for a mobile phone. However, if spending USD 293 will get something really bad or not worthing, in that case, I will still spend 600 for a new iPhone 8 What do you think?