You may not have to buy more supplies for months. Maintaining your current equipment should be your first line of defense. Nothing is as cost-effective as maintaining copiers, printers, and other equipment that is already paid for. Take the time to remove dust from vents to prevent overheating. Dust buildup can easily cut months, even years, off a device's useful life.
People can greatly affect equipment life expectancy as well.
Prominently post reminders to handle the machines gently so you can reduce the chance of the equipment becoming the inadvertent victim of user rage. Also, make sure manuals and troubleshooting guides are easily accessible in case of a breakdown or paper jams. And adhere to maintenance schedules. Saving the short dollars by skipping a maintenance visit can really cost you in the long run. When you do need to buy, do so judiciously.