I have done a few transactions with paypal before. I am in the trusted traders thread.
those who already have trades in the past might find benefit from registering with the #bitcoin-otc web of trust (wot).
once registered, anyone you've traded with previously and is also registered can give you a rating.
with multiple positive ratings you might find more parties willing to trade their btcs for your paypal funds.
http://bitcoin-otc.com/trust.php