I will say I probably wouldn't ever get a puppy puppy off of Craigslist, but not because it's Craigslist but for the same reason I wouldn't get one from a rescue. Don't know what I'm getting. But older puppy/young adult? Most certainly if I wasn't going through a breeder. When I was looking for Fergus I saw SO many dogs that if I had been looking for a fun sport dog I would have checked out because the families got the dog, it grew up and oh my word you mean this ACD/BC mix needs to DO THINGS? And the thing is, I hate hoops. I have had very bad experiences dealing with rescues and shelters and really would like to avoid them at all costs. Craigslist to me is full of people that have a pet they love but just can't keep anymore but don't want to see them put in a shelter where the person has no say over anything. Are their creeps on there? People just looking for money? People trying to get rid of their dog to the first person they can? Yep. But I also found a lot of sincere people trying very hard to do right by their dog. And again, no hoops or contracts or "You mean your dog isn't neutered? Then I'm sorry you can't have this ALREADY ALTERED cat."