Most people who buy a color laser printer use it to print mostly black pages. a color laser printer was not made to print only black, one of the reason is that all 4 color cartridge share one drum, when you print only black the other cartridge continue to turn whether toner is applied to the page or not causing an accelerated drum wear when little or no toner due to lack of drum lubricant provided in the toner itself.
so it is very important to know when buying a color laser printer is not to print mostly black pages. it worth getting a small laser printer to print only black and when ever you have color you send it to the color laser printer.