"Brand new. Opened to check."
I honestly never find out, why is somebody so stupid and opening sealed boxes? because of what? check the smell of new fancy iphone? check if is really inside? because on my experience, it is just lowering the value in majority of cases..
Well, whenever you get stuff from people on Gumtree/Craiglist/ebay, you open it to make sure that its not really a brick inside. I have seen similiar scams in sealed boxes. Cant really blame OP here about opening the box, but description could be "New, mint, open box" or something like that.