I don't advocate stealing cartridges to sell them back. Knock yourself out if you advocate it, though.
I have the buyback list up at: Removed. PM me for the list. If your cartridge isn't on the list, then we can negotiate pricing. We normally do 10% of our price for toner and 20% for ink because of the labor, packaging, and replacement parts that go into each cartridge (we only use the cartridge core, strip all other parts, and rebuild the cartridge from the core up).
By the way, to the individual that exploited our site within 2 hours of me posting a link, fuck you. Thanks for the days of work that I have for cleaning up.