While most of the users here are not scammers, the ones who answer your post with offers will be. Use a established escrow here and do not use Paypal period.
Not all people who wish to pay with Paypal will be out to scam. I would love to buy BTC with Paypal due to the ease and speed it provides. Being able to pay and receive the coin in less than an hour is very appealing, no other means of payment can offer this speed. I only steer clear due to the opinions of most of the users on this forum.
I bought my coins off ebay with paypal, but it is far too easy to get scammed on here with it. Buyers are usually safe as they can get their money back easily if anything goes wrong, but it's this that leads sellers to stay away.