Okidata 62427701 B2520 Multi Function Printer/Copier/Scanner/Fax

I found out the hard way that the Oki Data people will not let you refill the toner cartridge. You must buy a new one at 120 dollars a pop instead of only 60 dollars for a refill. How do they do this? You get a "credit card" with each NEW cartridge and insert this to "zero" out the toner error message. It will keep printing for a while with the refilled cartridge but eventually it stops printing. DO NOT BUY THIS PIECE OF JUNK!