if you want launch exchanger site is good youre post in exchange section or service announcement section
if you want direct transaction in bitcointalk member you can promotion in curency exchange section
I'm recommending this reply, since there are bitcointalk members offers also on BTC to paypal exchange and vice versa, just make sure that you use an escrow and don't ever trade with newbie accounts, only to trusted members here only to Sr. member and above to make sure that you will not be scam, you can view it on their trust page, like this
and just click that clickable link "Trust" to view his trust feedback if he/she's don't have a negative feedback or some positive feedback that he made a transaction with paypal exchange or just click his username and you can see the clickable link "Trust:".