With your email and name the only thing he can do is harass you.  

Don't give him your PayPal information.  He may be planning to empty your account.  

More likely he his planning to "buy" your item without paying for it.  He'll send you a notice that looks like its from PayPal that money has been deposited in your account.  He may try to pick up the armoire based on that payment.  Or the payment may be more than you are charging and he asks you to wire the excess to a shipper.  Later you'll discover that he never put money in your account.  You are out the armoire or the money you sent to his shipper.