All true - but I understand what Zach is saying. There are a thousand different possibilities that we haven't brought up. We should try to brainstorm from scratch, as hard as that is, and consider that WH isn't involved maliciously.
A Craiglist contact would probably have shown up on her SM somewhere for LE, but maybe she met someone in person? Like, a friend of a friend was gonna sell a GoPro or something. I guess one of her friends would have come forward with info like this, but you never know.