Once at home, the buyer would quickly open the box only to find that what they paid all that money for, was a tile with an Apple logo pasted on it, or a box full of packaging peanuts. By including some of the proper documentation and placing the Apple logo in the right spot, the scammers are able to pull one over on their marks, even if they make a quick perusal of the inside of the box.
If you're going to buy an iPad from someone standing on a street corner, you need to open the box and take out the device to examine it. Otherwise you just might find that you've been ripped off. While this has been happening often in Ceres, it is a scam that can happen anyplace. Don't be foolish.
source: SFGate via BGR