Best Buy Online sells additional input supply paper trays in two capacities ... 250 sheets and 520 sheets. The trays are internally adjustable for paper length and will accommodate both standard size and legal size sheets. As for yield, Best Buy Online also sells toner cartridges at three different capacity levels: TN820 (about 3000 sheets), TN850 (about 8000 sheets), and TN880 (about 12,000 sheets). The printer will come with a toner cartridge (I don't know which one) and a drum. The drum (DR820) will need to be replaced every 30,000 to 50,000) sheets (depending mostly on average print density per sheet).