[rolenthedeep]

You can buy kits online to refill your toner carts. It's cheap and fairly easy to do.

You just gotta make sure you get the right kit for your printer, as most have a chip in them that acts as a page counter. You typically have to replace the chip when you refill.

Some models like mine require you to melt a hole into the cartridge, there's no external access to the toner tank. Make sure to do your research and don't buy the cheapest kit you find. The quality of the toner does matter and will greatly affect print quality.