Very strange. A friend of mine had me create a cursory FB profile so I could join his team on a phone/location-based game. This went against my staunch opposition to join FB, but I figured it would be OK if all it did was allow me to play the game.
Now when I try access FB Marketplace, it says I can't, and that it's not available. I'm sure it's a ploy to make me complete my profile. As Liz Taylor scrawled with lipstick on a mirror, NO SALE!