Not sure if "appeared" is the right word in this case, but around 2004 there was a group/individual announcing Cisco Pix source for sale in a random "alt.gap.in

Not sure if "appeared" is the right word in this case, but around 2004 there was a group/individual announcing Cisco Pix source for sale in a random "alt.gap.international.sales" (heh) newsgroup post. They also offered Napster source among other, less important, things. It was all over the tech news at the time.