The remaining Prime_Ms are B-STOCK and sold as is. They are B-stock due to imperfections in the powder coat, primarily in the bottom inside where it's not visible. Some have some orange peel texture on the outside as well as minor rubs and dings. All are matte black.
The Prime_M is a premium input device that is designed to be flexible so that it can cover many needs. The case is milled from a solid block of aluminum and features an integrated switch plate, which is 4.75mm thick yet designed to allow MX style switches to properly snap in. The bottom cover is machine from solid brass and is pre-drilled/countersunk for use with optional feet to give the device a slight tilt. The PCB supports the popular keyboard firmware QMK.
The Prime_M supports the following layouts:
Standard numpad with 2 spare columns on the left for macros or whatever else you may need handy
Full grid with a 2u key in the lower right. Useful if you want to use this device as a gaming pad.
Two can be used for a split ortholinear setup. (two separate USB cables must be used)