Not colour? Happy to refill yourself?

Have a look on the Open Printing site to see if there's a driver that can be used with CUPS. Then have a look on toner seller sites to see if the carts can be refilled cheaply.

The Open Printing site tends to list any problems some printers / mutli-function devices have.

http://www.openprinting.org/printers

Check the wider www too, because OpenPrinting is user generated and might not be up to date.

http://www.cups.org/

The Arch wiki has some nice documentation for CUPS: https://wiki.archlinux.org/index.php/CUPS

So does FreeBSD: http://www.freebsd.org/doc/en/articles/cups/