I recently got a used HP Deskjet 5550 Printer (I think these are as old as 2002), I see a ton of expired Ink on Ebay, the sellers say they always work, but when googling this issue, I see many of these inks (or computers, etc) have some kind of timer and it will deem the Cartridge useless and...
I used to have an HP printer, I loved the fact you got a printhead on every ink Cartridge, but I hated the fact 3 inks were in one & ink was wasted--I used to refill these --but then moved onto a Canon -loved the individual ink tanks but HATED the pernament Print head cause it always got...