Today, virtually every kind of printer - from photo printers to laser printers to inkjet printers - are incredibly inexpensive. Unfortunately, the toner cartridges and inkjet cartridges that replace the starter cartridges the come with the printer are anything but. If you're in the market for an inkjet printer cartridge or a LaserJet toner cartridge, there are great deals to be had online. However, there are several things you should know before buying toner online.Understand Your OptionsWhen it...