When you own a company and you are focused on a piece or a small-lot production, it should be a no-brainer for you. Invest in a 3D printer, get your prototypes quickly and customize your products.
Should I buy simple RepRap 3D printer and use it in my company?
You probably don’t want to, but you should. RepRap 3D printers emerged after a huge boom in 3D printing market. They are based on the principle of making cheap, almost self-replicating, devices. However, you need to put a lot of work into it to make the quality of printings at least satisfactory. Those 3D printers are well suited for hobbyists, who are not afraid of discovering the whole 3D printing world on their own. RepRaps, in other words, are not easily maintained, and thus you should think twice before buying one for your company.