But you can find them listed on occasion. At least until the hippie police flag them. Being self-regulated, the enforcement is kinda spotty, though. IIRC, the craigslist servers are all located in California, so they play by those rules generally. Here in Memphis, you'll see the occasional shotgun or blackpowder listing, but they are usually flagged pretty quickly. There was a Remington Summit that stayed up for a week or so last month.