Cost: $2.5 . I couldn`t find a simialr commercial product to compare.
This is a stand where you can put your smart phone on the phone pad at the top and the pile of documents you would like to scan at the bottom of it. This eliminates the need for you to always align the document in the frame of the camera app on your smart phone. I made this as an aide to people with arthritis. Holding a phone with good grip and scanning documents might be a challenge to those suffering from arthritis.
Also, arthritis affected people might face difficulties holding a book for long periods while reading. In that case, you could put a book at the bottom and cast your smart phone onto a display like TV using chromecast or apple tv.
There are four major parts manufactured separately through 3D printing and then assembled. 3D printing is powerful because, different phones have different camera view angles and sizes. Using the .stl files I uploaded, you can easily modify the components to be a good fit for your smart phone. I used FreeCAD to do this. It`s an open source CAD package which is very easy to use.