Space Grey iPhone 5S 64GB - asking for $750
Purchased from Apple, and was never locked. I've used this with US AT&T during business travels. Phone has been babied, and has no scratches that I can see.
Phone is wearing Spigen GLAS.tR nano slim.
This is a 0.23mm glass screen protector. It's much harder and scratch resistant than plastic screen protectors. It feels smoother than the factory glass, and is removable with no residue (if you choose).
Spigen GLAS.tR link: Spigen iPhone 5S / 5 Screen Protector GLAS.tR NANO SLIM Premium Tempered Glass | Spigen