New promo code for ComboInk:  $10 off a $15 order with promo code 10MAY15.  Code is only valid through Saturday, May 31st; don’t put off ordering.

Here’s the ComboInk guarantee (and why I’ve felt confident about using them for so many years):

The cartridges we offer are 100 percent risk-free. We can be so confident about them because they are from some of the most renowned companies. We offer a One-Year Money-Back Guarantee on all of our ink cartridge products, if you are not 100 percent satisfied with its performance.