As everyone probably already knows, printer manufacturers practically give printers away and then rant about endless ink cartridge replacement costs. Unfortunately, the cartridges are coded so that if you try to refill the cartridge, the printer won't let you use it, so you end up spending over $50 on new HP cartridges, not $7 on refills. So far I've spent more than four times the price of the printer on replacement cartridges.
HP 902XL Magenta Ink Cartridge for π¨οΈ HP OfficeJet 6900 & Pro 6900 Series, T6M06AN
11 Review
4-Pack Toner Bank Compatible Replacement for Brother TN760 TN-760 TN730 TN-730 Black Toner Cartridge for MFC-L2710DW DCP-L2550DW HL-L2350DW HL-L2390DW MFC-L2750DW HL-L2395DW HL-L2370DW Printer Ink
11 Review
Inkjet MFP HP Ink Tank Wireless 419, color, A4, black
52 Review
Brother TN436BK Super High Yield Toner, Black - Retail Packaging
11 Review