If your primary goal is to clear out clutter and ensure your cartridges do not end up in a landfill, HP's official channels are the best route: HP Ink & Toner Cartridge Recycling
HP does not offer a cash buyback program for used or surplus toner cartridges. Instead, they provide a free recycling program called HP Planet Partners . However, if you are looking to get cash or rewards for your HP toner, there are several third-party and retailer alternatives available. ♻️ Official HP Options (Recycling Only)