I'm a low volume user on the Z3100. It may sit a few weeks between printings. I am slowly using up my initial 69ml cartridges and I need to buy new ones. As most of you know the price break for a twin pack over individual packs is pretty good. I buy my supplies from
www.costcentral.com. Using yellow as an example: a single cart goes for $62.78. A twin pack goes for $94.44. That is a $15.83 per cart savings! Multiply that by 12 and now we are talking some real savings.
I have bought the Gray, Light Gray and Yellow twin packs so far. At my current usage rate I will need another color long before I will need to the colors I just bought.
So if there any other light volume users who would like to trade carts with me, please PM me. The cost to ship a new cart in a padded envelope using 1st Class mail in the US is about $2.20.
thanks
Jim