http://www.att.com/shop/wireless/devices/samsung/galaxy-s-iii-pebble-blue.html
It's $549 directly from AT&T as well. I assume BB = Best Buy? If so, go in and tell them to look up AT&T's price (assuming you have an AT&T close by). if so, they will honor it. I believe they require the AT&T to be in the same town as the Best Buy. Even so, for a $150 savings that might be worth a bit of travel, depending.
Forgot about price matching. Thank you, sir! $349 is definitely affordable (with my reward dollars included). And considering I'm lazy and still have a 3GS, 4, and GSM 4S 64GB laying around, this should be more than doable if I actually bother selling them haha.