In June, Staples will become among the first major retailers to offer a 3D printer. It will also be among the first to offer an affodable one, with 3D Systems’ Cube 3D printer being sold for $1,299, the company announced on Friday. Although $1,299 may seem expensive, there was a time when the cheapest dot matrix or impact printers cost more than that. The price will inevitably come down. The Cube 3D Printer works with both Windows and Mac OS X. It comes with 25 templates with more available online.