Several companies buy back HP ink and toner cartridges, but the "best" option depends on whether your cartridges are or unused/surplus . Where to Sell Empty (Used) HP Cartridges
Unopened, genuine OEM cartridges have much higher value, ranging from depending on the model. Recycle Unused Ink Cartridges for Cash - Ink Genie who buys used hp ink cartridges
Pays reimbursements for empty HP cartridges that can be deposited into a bank account or donated to charity. Where to Sell Unused (Sealed) HP Cartridges Several companies buy back HP ink and toner
Empty cartridges typically have a lower payout, often between each. Where to Sell Unused (Sealed) HP Cartridges Empty
Instead of direct cash, you can receive $2 back in rewards per cartridge (up to 10 per month) if you make a qualifying $10 purchase in the same month.
A specialized buyback program for businesses and organizations with no minimum or maximum limits on the number of cartridges you can sell.
A highly-rated online service that offers an instant trade-in estimate and free shipping labels. They mail a check within 30 days of inspection.