I am wondering if the buyer ever had German Shepherds before. They are not for a first time dog owner.
If you don’t count the cruddy mutts my parents tried from the pound whom I don’t remember (except Wagner, also didn’t last long), my 1st dog was a German Shepherd as a 9yo. “BYB” - farm puppy - a good dog, albeit with a “long” story.
(BTW - I think I wanted a GS because I was awed by the police demo given for our elementary school. I thought “wow what dogs!” - and it’s worked out fine. Not that you can’t be wise about what you do.)
More than likely that’s the case...
Video of the dog in this story doing obedience work. She was definitely trained, and definitely high-drive. Not a dog for someone looking for a lay-around-the-house pet:
https://kraftwerkk9.com/2011/10/watch-emmi-perform-obedience-exercises/