Canon is getting away with printers that won't scan sans ink — but HP might pay - The Verge
HP #21 & #22 Ink Cartridges - Diamond System Store
21 22 Ink for HP Printer Ink 21 22 21XL 22XL C9351AN C9352AN for HP Deskjet F4180 F2210 D1560 D1530 D1420 D1520 3915 3930 PSC 1410 Officejet 4315 J3680 Printer (Black, Tri-Color) - Walmart.com
HP 21 Black & HP 22 Tri-color Original Ink, 2 Cartridges (C9509FN) - Walmart.com
Valuetoner Remanufactured Ink Cartridge Replacement for HP 21 C9351AN | Valuetoner
Compatible HP 21 Compatible HP 22 Black & Color Ink Cartridges (C9351W
Buy HP 21 & 22 Original Ink Cartridges - Black & Colour | Printer ink | Argos
HP Officejet Pro 9012e All-in-One - Multifunction printer - colour - ink-jet - Legal (216 x 356 mm) (original) - A4/Legal (media) - up to 21 ppm (copying) - up to 22