The original printer claims it comes with 6000 page yield color cartridges but a 5500 page yield starter cartridge for the black.
There are also 2000 page low yield color and 11000 page high yield black cartridges available.
The replacement cartridges he is looking at are 6000 page yield for color and 11000 for black. So the black is twice the capacity of the original.
You can also find aftermarket compatible toner, the high yield version 10,000 black and 6,000 for each color, for $330 for a complete set of cartridges for this machine - http://www.lenscomputers.com/hp-m551-vp.html.
There are also 2000 page low yield color and 11000 page high yield black cartridges available.
The replacement cartridges he is looking at are 6000 page yield for color and 11000 for black. So the black is twice the capacity of the original.
You can also find aftermarket compatible toner, the high yield version 10,000 black and 6,000 for each color, for $330 for a complete set of cartridges for this machine - http://www.lenscomputers.com/hp-m551-vp.html.