This is funny… We got a bulldog at first, but within the first week, the vet said it would need $3K laser eye surgery and it also bit through it's lip because of it's underbite. What a health wreck! The breeder accepted the dog back... so sad. 
But good for me, Basenji's definitely suit me better!! 
Yeah i dont like the bulldog's i need something more active…
Have you thought about maybe looking at a rescue since you'd prefer a older dog? With this you could also try the foster route for a bit to see how a basenji would work with you for a bit.
Here's the link to BRAT (Basenji Rescue and Transport); they often have many dogs that are also not listed on the site.
http://www.basenjirescue.org/
Best of luck on your searchfor a basenji 
Fostering might get you in to the reality of owning a b.
I think going to BRAT and asking to foster would be the way to go.
If you like the dog you foster, you can always adopt it.
