Buy 2 inks and get 1 free at the HP Home and Home Office Store. AND save an extra 20% off your $50 ink purchase with coupon code SWEETINK20 (yes, you can stack the discounts!). Shipping is free. Offer is good through 7/28/12.
I compared my ink order on HP.com to Staples' current Buy-2-and-get-1-free ink deal and the HP one is better because:
- you get the additional 20% off, which works out better than the 10% rewards at Staples, and
- you can mix and match your HP cartridges, whereas with the Staples deal, you need to buy three of the same cartridge if you buy them online,
- in most cases, you get free NEXT DAY shipping at HP.