Very cheap laser printer toner cartridges

It was a happy day when, several years ago, we retired our color inkjet printer and bought a laser printer. It doesn't make color prints, but we rarely need them. It's fast and best of all, 3rd-party toner cartridges are dirt cheap. Amazon sells a 2-pack of the TN450 compatible high yield toner cartridge for most Brother printers for $14, or $7 each. The genuine cartridges sell for $45 each. I've never has a problem with any of the knockoff cartridges.