I would add that a reputable breeder will call your vet for a reference. A reputable breeder will only have one litter every year or two. A reputable breeder will also only sell you a puppy on a limited registration (most likely your Facebook people aren't showing).
A reputable breeder will NEVER sell a puppy earlier than 8 weeks, or let you visit before they are a certain age to prevent Parvo!
And adding on to the marketing terms... a BYB will charge more for a "rare" or "special" color.