Shopping for Okidata B731DN Toner Cartridges

Apple AirPrint™ supported. Printer firmware upgrade required (read instructions). B731dn print speed up to 55 ppm; B721dn up to 49 ppm. First page prints in as little as 5 seconds.  Duplex (2-sided) printing standard.  Standard high-speed USB and 1 Gigabit Ethernet connectivity.  256 MB RAM standard, upgrades to 768 MB2.  Powerful 800 MHz processor.  630-sheet standard paper input expands to 3,160 sheets with options. 100-sheet multi-purpose tray. Easy-to-read backlit control panel with easy-to-use alphanumeric keypad. USB host port for walk-up printing. Rock-solid performance: B731dn monthly duty cycle up to 280,000 pages; B721dn up to 250,000 pages. High-quality 1200 x 1200 dpi resolution for crisp, clear output