Metal injection molding machine

My company is looking into purchasing a metal injection molding machine, so we can explore the possibility of using this technology to manufacture some parts for the ball screws we manufacture. I have been tasked with finding a machine to purchase, and i have absolutely no experience with metal injection molding, or any injection molding. if anyone one on this board has any advice on what brands are good,whats considered a lot of hours on a machine, is buying new a must, or is used the way to go.

Thanks for your help.