The new cartridge costs $25, on average, it is enough for 2000 impressions, a bottle of toner at a gas station (110 grams, used toner for HP), costs from$ 4. In specialized refueling refueling service centers will cost ~ \$ 10. Others consider themselves. It is believed that the cartridges 703 and HP Q2612A stand 2-3 refilling, after which changing the drum and wiper blade. Sam cartridge can withstand up to five such shifts. Then we must take the new cartridge and everything is repeated again. However, these figures may vary. Primarily plays the role of daily load on the printer itself and the quality of toner refilling (more cleaning cartridge). And of course the very quality of the cartridge. A friend of mine (special middling) argues that in their office cartridges the HP q2612a (printer is the Canon LBP2900 ) refilled at least 8-10 times without any replacement of drums or other.