Wilson & Piper are my "Craigslist" dogs. I got them both as puppies though, so a bit different than getting an adult dog. Wilson I got before I really knew about BYB's (I knew puppies from pet stores = bad but wasn't as educated on health testing and such).. he's from an "oops" litter.
Piper I did know about BYB's, but originally I thought she was from a rescue litter because the people told me her mom was a rescue and had puppies (so here I'm thinking it's a female that was pulled from a shelter and these are the pups).. but no.. they adopted mom, bred her to their male, and out came puppies.. complete with Demodex! Once I saw her in that crappy apartment with cockroaches crawling up the walls and covered in fleas, I couldn't just leave her there. So yeah.. gave them $50 and we pretty much ran out of there with her.
Either way, I don't regret getting either of them one bit. They're great dogs. Wilson has no health or behavioral problems whatsoever. Piper has had some health (mostly allergy related) issues along the way but since switching to raw she's great.