(Almost) Free Color Printing

I like color printing, but the cost of those color cartridges is outrageous.  As a solution for not-so-important prints, such as internal spreadsheets and color marketing drafts, I have purchased a K550 dtn by HP, along with an uninterruptable ink source.  While not attractive, the ink supply wells never run dry and printing cost is reduced to basically the cost of ink and paper.  The ink supplies can be purchased from e-bay.  I believe this model printer is out of production, but can also be purchased on e-bay.  Special thanks to Gary Garland for alerting me to this money saving technology.