My old man asked me to look for a cheap cartridge for his lexmark printer as he is sick of paying £17.99 ....
Found this on the WHsmiths website.
free delivery to store
"Genuine Lexmark 32 Black Ink Cartridge Integrated printhead for sharp, crystal clear results Produce laser-quality images and text, even on plain paper"
Lexmark Printers P900 Series/P4300 Series/P6200 Series/P6300 Series/X3300 Series/X5200 Series/X7100 Series/X7300 Series/X8300 Series/Z800 Series