Ed, ours is a model number 4650.  I learned, when I went to buy a new color cartridge the other day, that the ink for that model, costs more than our previous printer, and also more than many of the other Lexmark models.  It was about &#036;40 for the color one.  I told Greg to save the old cartridge and I may try taking it to Walgreen&#39;s and having it refilled....has anyone every done that?