sounds like a scam.
don't use paypal for receiving money.
even if someone seems trustworthy, they have up to a year to take back their paypal "money". you don't know if their morals or circumstances can change during that time. they might get desperate.
PayPal them self, wont protect the Buyer on Digital Items.
THATS the reason allot of Scammers are selling Bitcoin via PayPal, because they know PayPal will not protect the buyers at all.
Those who used a Credit Card via PayPal, then they have the option to do a Chargeback via their Credit Card Companies.
Read this, its a personal experience being scam by a Seller selling Bitcoin.
https://bitcointalk.org/index.php?topic=463092.0