I've got a few of these that I'm not using. They let you network any printer with a parallel port, and they work with Mac and Windows. HP still sells these for well over $100, but since they're used I'm asking $70 plus shipping. You'll get the actual device and it's power brick. They're of course guaranteed working.
Please email me at chrisvoelker@smartneighborhood.net with interest and offers.
Price is now $50 plus shipping.