At HP Home & Home Office, buy two HP Ink Cartridges and get a third cartridge for free. (Add three to your cart to see the discount.) Even better, coupon code "SWEETINK20" cuts an extra 20% off. Together with free shipping via next business day delivery, that's the best such deal we've seen on these inks from HP. Sales tax is added where applicable. Toner and other exclusions apply. Deal ends July 28.

A best bet is 3 HP 14 Black / Color Ink Cartridge Combo-Packs (six cartridges total), model no. C9337FN#140, for $111.98 before coupon code "SWEETINK20", $89.59 after. With free shipping via next-day delivery, that's the lowest total price we could find by $60.

Update: The 20% off coupon has a minimum purchase requirement of $50.