Hippie Haven will recycle all printer ink cartridges for free. They have drop off containers at their store.
Best Buy will recycle all ink and toner for free, with a limit of three items per household per day. Recycle your old ink cartridge and receive $2 savings on your next ink purchase of $40 or more, or recycle your old toner cartridge and receive $2 savings on your next toner purchase of $100 or more.
Office Depot will take all brands of empty cartridges at no charge! Bring your empty cartridge to the cash register.
Make a $10 qualifying purchase during the same month and you will get $2 back in rewards per recycled cartridge. Rewards will be paid out monthly as a rewards certificate online.
They also have a free pre-paid UPS shipping label on their website:
EchoWorks recycles printer cartridges at $1/lb