I know someone who got a "cheap" yorkie cuz she didnt think they were worth paying for. The breeder made her take the pup a few days shy of 6 weeks. I warned her over and over and told her WHY that wasnt a good idea. She didnt listen.....
This pup is now 4 months old and is INSANE. This dog wont stop biting. I went to see it..picked it up and i couldnt get it to calm down at all. I couldnt even hold it because it was too active and biting me. It wont
stop biting and she's talking about rehoming the pup

All that does is pass the buck off to someone else. (ya get what ya pay for) The pup wont potty train, but has free-run of the house too.
I've offered advice and it gets ignored.....its a shame