Sure, there is always some risk involved. That's why quarantine is always recommended, although that is no guarantee either. When you buy local, you can just walk away if you don't like what you see. The more I learn, it seems like there is no such thing as true biosecurity, unless they are in a bubble. The minute chicks go outside, they are exposed to disease. Everyone decides how much risk they want to take. I'm just saying there are alternatives, that's all. Not all of us are in a position to hatch eggs, either.Personally I would be concerned about biosecurity with sellers on craigslist, ebay etc. You have no idea what conditions the flocks are in like backyard breeders and puppy mills. Get eggs shipped, less risk.