As an update:
I have not heard anything back from the breeder. While her facilities do look nice, I would bet that she has not tested the dam/sire for anything. Based on her facilities, it seems she is more like a BYB than a puppymill. However, obviously if she hasn't tested her basenjis, she shouldn't be breeding.
The owner seems to be willing to come down from the price if no one else is willing to give her the $400 asking price. However, I don't think BRAT is an option for her since she is looking to get some sort of money for the dog. I was interested but at this point, I simply cannot add another dog into my own life.
I hope Macy finds her forever home soon. If anyone is interested in her please let me know & I can get you the information.