I bought an HP Officejet Pro 9018 All-in-One printer from Costco. It came with a free limited supply of ink cartridges through their hpinstantink.com company. What they don't tell you is that if you don't continue to buy cartridges from HPinstantink.com, the initial free cartridges you receive from them expire at a certain date. Their ink cartridges have sensors, which disable the printer if the "free" introductory cartridges are installed in your printer. This happens if you have not opted to enroll in their service by a given time.