This ass is a scammer, once someone claims to accept a payment method that is reversible to fool newbies into avoiding an escrow just know that person is a scammer without a doubt, no one in their right mind or honest would tell you send me funds and you can refund when something goes wrong.

If he refuses using an escrow then ask foe a selfie with a note stating his details and that he is selling btc to you for paypal including his ID, Paypal email and his wallet and the wallet he will send the payment to after receiving the paypal payment.