Printer TOner Recycling/reuse?

Hi, just wondering what people do with their empty toners? At the moment we send them to a company and they give us credit for them on their products, thing is the toners they sell are more expensive than everywhere else so it doesn't really save us anything. Can anyone reccomend recycling places or collect for credit etc?

Thanks

We use these guys: Recycool - Recycling mobile phones and printer cartridges with schools for cash

You dont get an aweful lot for the empty toners/inks however i am happy in the knowledge that they are getting recycled properly.