DuraECO via Amazon offers the HP 85A CE285A Compatible Toner Cartridge 4-Pack in Black for $31.99 plus $4 for shipping. That's $3 under the lowest total price we could find for a comparable pack elsewhere. (For further comparison, we saw a 2-pack for $13 less last summer.) Sales tax is added where applicable. Each cartridge yields up to 1,600 pages and is compatible with the HP Laserjet P1102W, P1102, and M1212NF.