AFAIK paypal will get the transaction refunded/recalled from his bank anyway - scammers dont win if the payment is through paypal.
indeed paypal do fix stuff like this.
got the official case conclusion today
We have concluded our investigation into your case and have decided in yourfavor.
We were able to recover 415,00 GBP and this amount has been credited to you.
Please allow five business days for this adjustment to be posted.