Getting an android phone as a gift so wanted to sell my iPhone 6s to someone who will appreciate it!
It works perfectly, I currently have the beta iOS 10 installed, which you can downgrade from but works really well!
It's got apple care for awhile so if any issues happen with it they will fix for free until or they will replace the phone twice for water damage or anything like that.
I've had a dbrand sticker on it so no noticeable knicks and a glass screen protector. But with applecare until non of these should be an issue as you can get a different one from apple if need be.