This Guy by the user-name Larry Ellison on Facebook posts ads to groups claiming to sell 20sbd for 20usd. From his steemit profile https://steemit.com/@hebrew1 the 20SBD are there on his account. After asking for your username he will initiate a trade as a transfer to your steemit account and send you unconfirmed transaction screenshot for you to send 20usd inform of btc for him to confirm the transfer.He claims to be new on steemit only to realise he had previous done some transfers on block trades few hours ago.
Below are screen shots from the conversation with the scammer and his steemit account.
KEEP YOUR FRIENDS SAFE TOO BY RESTEEMING THIS POSTAND MAKE THEM AWARE OF THIS SCAMS!!!!!!!!!!!!!!!!!!!!