I bought a HP laser printer a year or so ago. Great printer, love it except that toner just started running out and replacement toner literally costs nearly as much as the printer.
I was expecting to pay a premium for toner, but not a "might as well throw the printer out and get a new one" premium.
Actually, speaking from experience, you can do this yourself (or mostly yourself with some guidance from professionals). Nolo press has a book ("Patent it Yourself") on the topic.