I personally would not want to get a dog from this breeder.
This breeder does have a reputation of selling dogs to anybody who show up with the money. I have seen her dogs ended up in many BYB or Puppy Miller's hands. I agree with Pat, $1500 is quite high and I am not sure what kind of health testing she has done on her dogs. All the "extras" this puppy came with is very basic stuff that any breeder would have done on their puppy by the time they are 5 months old. And like Pat said, Jake is NOT the all the winning BIS basenjis in US.
From how I look at it, if I am selling each of my puppy for $1500+ to anybody everybody who show up with the money without doing intensive screening. I have seen her website advertising in many online puppy selling websites, selling them for as high as $3000 or more a puppy. If I am making a big profit from selling pups, I could afford to show my dogs in other countries and achieve the so called "International titles".
Just my personal opinion.