That’s why Brother, Canon, Epson, and HP all offer ink subscription plans, delivering replacement cartridges to your door the moment your printer detects that you’re running low. Some services ...
As with the MFC-L2820DW, Brother sells the MFC-L2900DW both by itself and in a version that adds an "XL" after the model number, costs an extra $50, and packs an extra toner cartridge in the box.