[Waifu]

I'm guessing that an individual before them purchased the item, and boxed amazon - giving them an empty box.

Amazon would've shipped the box In Its factory state, so It's more to the fact that the sealed box method was used by another SE'er.

That said, I can confidently say that manufacturer errors do take place and although It's unlikely to occur with an Item of that value, It does happen from time to time.

Agreed. Amazon has cameras in their facilities as people tend to steal things when they are not being watched. Alternatively, if there was not an SE'r who boxed them, it might've been someone from amazon who stole the package.