Have you ever looked into a high-end DSLR? Those things are quite pricey, though as they say, you do get what you pay for. With that line of logic, what do you think you’d get for under $6? You can get a Canon EOS 5D Mark II. It’s just not going to do you much good when it comes to taking photographs.
Instead, what you will receive is a 3D Paper Model Kit. The kit provides everything you need to construct a high-end camera out of paper. Now you might think that there is nothing useful about such a thing, but papercraft is a rather interesting form of art. Thus, putting together a camera out of nothing but paper would be a way to help hone that craft.