I have a basic Brother monochrome laser for high volume. I can buy a compatible cartridge for 9€. An Epson A3+ (tabloid) inkjet for color and photos, not a real photo printer, only 4 inks. Compatible inks cost less than 3€.
A great option is to buy auto reset refillable carts, and refill with genuine epson eco tank ink, super cheap, and guarantees Epson quality
You are probably talking about toner (dry black powder).