I normally get my tickets on here. Just make a post stating what exactly you're looking for and your email. Somebody will normally get back to you with an offer.
There are tickets outside the PMAC. The problem I find with that though is that there are so few people that actually go to the games, that means there are fewer people out front selling tickets. Like I said, you can find some outside the PMAC though.
For me personally, I just find it easier to get them on here and not have to worry about it.