[Velofellow]

You are totally right, but like anything illicit, Caveat Emptor... Had a former roommate who grew magic mushrooms from a spore syringe. She was convinced they were of good quality, but she was growing them in a terrarium on the floor in a shared room with a large pet rabbit. Cleanliness and Hygiene were sorely missing. I'm not a mycologist, but even my untrained eye knew something was way off with the mushrooms she was growing. She did not end up selling them, but took her lots of convincing not too.

Moral? The closer you can get to know those growing / harvesting the better. I've always had good luck through my connections for herb. I imagine in recreational 420 states, it's harder to ask the dispensary where to get Magic Mushrooms though.