It Took Me 1.5 years of looking and talking to breeders before I was able to get on the waiting list in time to get a pup. You have to start preparing and talking to breeders in the early fall in order to get on the reservation list for a puppy by next spring
Please go to basenji club of america for a list of breeders. If a breeder is not listed there, you can be pretty sure they are not a responsible breeder.
http://www.basenji.org/index.php/about-basenjis/breeder-directory
The Basenji Meetup in New York City has a list of breeders who provided dogs to members. You can find it at: http://www.meetup.com/basenji-nyc/pages/Breeders/.