Despite the growing popularity of 3D printers, being limited to purchase through specialist stores and online shops means they still occupy a niche market of hobbyists and professional designers. Soon, though, you will be able to just dance into your local office supply store and pick one up along with a your pens, pencils and envelopes.  Staples will become the first major US retailer to offer 3D printers on its shelves, starting with the Cube from 3D Systems. Is it time you read the book on how you can 3D Print Money?