LocalBitcoins.com has person-to-person PayPal trading:

http://localbitcoins.com/buy-bitcoins-online/paypal

https://localbitcoins.com/sell-bitcoins-online/paypal/

There are also discussion forums where people frequently discuss about PayPal, avoiding fraud there, etc. Here is an example:

https://localbitcoins.com/forums/#!/trading#getting-paypal-scammedive

LocalBitcoins.com has also trusted buyers list where you can set your trading parties trusted and make trading offers available only for them (to avoid scammers).