I too have been a member of epicnpc for some years although not active sold a few things through them. It is a pretty busy forum.
I've been a member of PA since 2001 and it is the safest, but it really sucks for a seller trying to sell multiple things and has a lot of annoyances not to mention the ridiculous fees for the amount of dis/service they provide. Let's not even talk about the ridiculously slow and buggy character selling form that PA has. Sorry, rant off.