Just signed up with this site a few minutes ago – frankly, even with Rewards, I’m paying way too much money on cartridges at Staples, so thought I’d check out this ComboInk link.  Standard shipping is FREE over $50 – only $3.99 under!
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.

Okay, let’s do the math:  I mostly use a HP Laser Jet P1006.  New cartridges at Staples are $68.99 – the ComboInk price is $27.99!   holy crap!!!!  Yes, I am going to put in an order for this one and the ones for FirstBorn’s color printer (’cause that machine’s another source of wallet-frustration).