If the person who wants to sell him to you and is willing to place him at 5 or 6 weeks old..
And cant or wont tell you who the parents are...run like hell.
She did not try to send him home with me at 5 weeks. I just went to pick out which of the litter I wanted. She also did not refuse to tell me who the parents where, they were both there with the pups, I just did not think to ask while I was there. I am sure they were never show dogs, but I know they are both registered Basenji.
I am going to visit Odin tomorrow. I will get pictures of mom and dad and ask for their names. I also what to know if they have been tested for Fanconi.
Also parents should be DNA tested for PRA (night blindness), cheek swab like it is for Fanconi. These two are really however only the tip of the iceberg in a breeder doing responsible health testing. You should get the sire/dam's registration numbers also. And as far as DNA testing for Fanconi and PRA, results are made public at www.offa.org. You should ALWAYS verify yourself, don't just take someone's word for it. That is what I always tell potential puppy owners. Here is a link to one of my Basenjis so you can see what it looks like. https://www.ofa.org/advanced-search?f=sr&appnum=1415062