pro -
may not help with the backlog you have now but to keep up with what you're using....
staples will give you $3 per cartridge up to 10 carts per month.
you get rewards $$ - not cash.
rewards points expire every 2 months so saving up to buy a computer is unlikely.
you can order things from their online store and use the points and free shipping - or present your rewards check at checkout in the store.
that's for a personal account. a business account may allow you to turn in more per month.
as of the last year they accept any brand cart regardless of whether they sell it or not including toner carts.
i googled and found this as well..... they recycled 22 million carts last year - staples has also become more environmentally-friendly by building LEED-certified stores, using recycled paper in their copy centers, offering green consumer products, and investing in clean energy.