I haven't seen a Copy Toner scam in a while. I thought they were mostly gone. Here is an example of one from the myth-busting website, Snopes.com. The Federal Trade Commissions has a perpetual warning about them. Regent Imaging Supplies uses the oldest scam on the books to make money.
The scam works as such: the company calls businesses to sell them toner and asks them to update their information. They speak with employees; almost never do these outfits speak to the owner of the business. They get the employee to agree to purchase supplies from the company, then charges an astronomical price for basic office supplies.