Computer printer
Printers that are more expensive to buy will usually be less expensive in the consumables (the ink, toner, or ribbon used by the printer).  Therefore, laser printers are often more expensive to buy than inkjet printers, but are not as expensive to use over a long period of time.  Inkjet printers on the other hand cost more to use because the ink tanks they use are more expensive than the toner for a laser printer.