> What does facebook marketplace have over craigslist?

Users.

In Portland, Oregon area Craigslist was popular, but is now a ghost town. Everybody has moved to Facebook marketplace.

in my region (middle east) facebook marketplace is the defacto listing. I know craiglist (just from me being on internet for so long) but i don't think it operates here. And for sellers they also only know facebook.

Locally, craigslist was never a thing. I cross-post everything I sell to Facebook and Kijiji, but I get an order of magnitude more sales from my Facebook posts. (And Kijiji has gated certain categories behind a paywall, so e.g. I can't post a $20 car part without paying $5 for the ad.)

Listings and audience.