Imagine 3 years from now your puppy buyers move, have kids, get divorced and no longer want to own the dog. So they drop their untrained dog off on your doorstep, without warning. Or 5 years from now other puppy buyers cannot afford needed vet care and bring the dog back to you to deal with. Yet other adopters screw up their dog with bad training, and you get back a highly dog reactive mess. And on and on. It really does happen!
Or worse: Imagine that one day, I call you from the other side of the country reporting that a dog you once bred far, far away, many years ago is now in our rescue, pulled out of one of our high-kill shelters, with mange, heartworms, and a slew of serious health issues. We traced it back to you through surrender paperwork or a microchip. If I ask you to take responsibility for bringing the dog home and caring for it, do you have the means to do that? Good breeders really do! If one of theirs somehow ends up in a shelter or rescue and they learn of it, they move heaven and earth to help. I've worked with one who did that for a SENIOR dog she'd sold as a puppy many years ago. She was devastated by the life the poor dog had lived when she found out its story, and she resolved to make things right by adopting it, and making it her personal dog....even though she was over 1000 miles away. She took responsibility for an old dog with health problems, for the rest of its natural life. That's a lot of responsibility.
Finding good homes is NOT as easy as novices think -- and you're on the hook to be their safety net for life. The chance of getting home selection 100% right your first go round is pretty low.
If the litter gets parvo from your shoes and you have a $5,000+ vet bill, can you handle it?
If one of the pups develops HD and the buyers blame you and want to enforce a guarantee, can you deal with that?
Lots to think about!