Just the way the guy is holding him, I'd guess he needs training (like all dogs) and that's why the people don't want him anymore.
I wish I had the time and space to take in more.
I forwarded the information to the breeders that are members of Willamette Valley Basenji Club and Evergreen Basenji Club along with Sharron, BRAT representative.
I emailed the poster on the 13th and have not gotten a response. Hopefully he will end up in a good place.