This is a fake check scam and the details of the scam is summarized by the following para from the news:

“In the scam, Sharifaie-Arabi allegedly sent
his victims a counterfeit check he said contained extra money that they
could keep if they would only send him a money order for the remaining
the time they would send the money order and the check is set to clear
in the bank, they would find out the check was fake,”

In short, scammer gives you a fake check, and expects you to send him back real cash.

This is the guy: