I have bad news for you.

http://www.anandtech.com/show/10677/hp-acquire-samsung-print...

I bought it once it but it costs about 50-60 GBP (i had printers for as low as 17 GBP on sale) and it only doubles the page count if you use it all the time, once you let the tones sit they seem to degrade quite quickly for some reason.