Not everyone is poor enough to scam for small amounts.
WeSellCrypto is $15 and Virwox makes you wait a lot for shitty rates.
Most if not all Escrow are going on the record to say they won't be dealing in PayPal to BitCoin transactions (in either direction)
You might want to refresh your reading of this:
Beware of PayPal and other reversible transfer services https://bitcointalk.org/index.php?topic=14632.0