SuperMediaStore offers the HP 12A Compatible Toner Cartridge in Black, model no. Q2612A, for $19.99. Better yet, add seven to your cart, which will then automatically yield two more cartridges for free (nine cartridges total) for $125.93. With free shipping, that's $13.99 per cartridge and the best per-unit price we could find. (For further comparison, we saw a 2-pack for $30 shipped in March.)