First, sorry we haven't met yet but I look forward to it. As a transplant from the midwest myself, I get where you're coming from in trying to understand a new "market." AZ is different from the group I was active in, in Minnesota (TCMAS). What I've noticed here is that there's not as much selling/PIF via the threads but great deals/trades happen when you start connecting with people at the meetings. I exchange a lot of texts and calls with people vs. PMing and everyone has been super helpful, whether it's getting advice or just hearing me vent about how frustrating the hobby can be. Just the other day, I was having an issue and a friend came over to double check my water. I gave him some SPS to back up just in case and I know him and others are willing to hold more if needed. I know others are just a phone call, email, text away if I need sage advice.
I also agree that because there are a lot of different opportunities to connect -- RC, FB, the other forums, and monthly meetups -- communication is more spread out. This is a face-to-face, hand-shake type group.
All that said, if there's a specific coral you're looking for, I've found that a "WTB" thread will get you a long way.
Anyway, welcome and keep coming to the meetings!
That is awesome that 10% goes to fund PROP for more corals.. But does anyone have the list on what has been purchased? Do they also accept donations of certain high end frags or cash? I would love to help!!
To answer this: Most (not all) of the PROP corals are on azreefs under "PROP Information" and most have pictures associated with them. We're currently working behind the scenes to re-inventory and photograph all of the PROP corals. It's a work in progress and we all have day-jobs so please bear with us!

Occasionally reefers who have been in the hobby for awhile donate a few corals to the auction with 100% of the proceeds going back to PROP to fund new coral purchases. For example, JPorter has donated the beloved pearlberry and "mystery" corals, while Reefstew has donated dendros and other high end pieces. This isn't necessary or expected though. Just showing up, chatting with people and bidding on corals helps PROP and the entire community.
If you find yourself in N. Phoenix and want to check out my reefs, let me know.
Z