I think it is important for people to critically look at potential breeders instead of going 100% off hear say. Here is a thread to read about spotting good breeding practices. Take a look and then evaluate this breeder. People should chime in with some help though, but it is important to be learning too.
Both health and temperament issues are rampant in King's Ransom Dobermans. We've had many come through rescue (Doberman Rescue MN).
If you are looking for a puppy in MN, I would recommend you take a look at Jaimand Dobermans: Home If you're willing to expand your search further outside of the state I'd be happy to recommend some other breeders, too. You can do SO much better than KR.