how do people make money?

The seller has a VPN, and his location is Vietnam, he's right here in the US. My guess is, that's direct shipped from AZ, since the receipt is dated yesterday. I see no proof that it's stolen.

Edited to add: is that your discover card number on the receipt?

Some sellers will offer prices at/below cost to drum up support for new business. When I sold Kawasaki's, we made more on the helmet than we did on a Ninja 250.
"Loss Leader".