I think that the email address on file with PayPal is usually the correct email address belonging to the real account owner.
I emailed the true account holder of the paypal account that the scammer was trying to use on me.
The owner replied today saying this:
IMO, If you are a trusted seller, someone with a good rep, Itrader, long time on the forum. A new member, buyer shouldn't mind waiting 24hrs - 48hrs for you to transfer the name. That would give you some time to do a little research and email the paypal email address on file. Selling to other long time members with good itrader is another story, I usually send those asap.