I've been trading since 2007 so expect a quick and smooth transaction.
For clarification, you have not been trading bitcoin since 2007. Bitcoin was created in 2009 and only started trading in mid 2010.
It is obviously advisable to use a trusted escrow when dealing with this person, and you should not send first because "paypal is reversible"
Actually OP is buying BTC and he's willing to pay with Paypal. So it's advisable not to trade with him at all, not even with escrow, because he doesn't have enough trust here to guarantee he won't charge back in the future.