Craigslist scammer targeting my son...

My son put an ad on craigslist for some car parts and a guy responded who is trying to scam him... He sent a large check above the amount, and is trying to get him to send him back the "difference"...

I told him to be careful and not send any money until the guy's check clears, and wouldn't you know it, the check bounced (bank says the account was closed)...

Why would anyone even deposit such a check?

If that didnt immediately wave a giant red flag...well...