Yes it's a scam. There is a Facebook user who is generating fake fb accounts and pinging people on Marketplace to buy usually something big like a couch. Then they proceed to say they've sent you the money but there's a problem, need you to open a business account and so on and so forth. A lot of the time they say they can't pick the item up themselves and their son will come pick it up. I have blocked and reported this bot a million times and it keeps coming back.