As soon as AT&T can find a way to make up the discount by charging you for something else. Also you can get different prices from them for the same phone 1. Internet Price 2. In Store Price 3. Call in to order price. I was with them for 9 years and I got a great deal on my 9930 from Sprint. Do yourself a favor and leave them.
I also purchased a refurb from at&t and I couldn't be happier. I originally bought an atrix 2 but it was dropping calls and it was uncomfortable to hold. My bold came in a brown box from at&t with a charger, ear buds, and a few papers/manuals. The phone is in great shape and with the new os it's getting great battery life. I highly recommend getting a refurb I love this phone!
There are no discretionary purchasers of a Blackberry.. hence there is no need to compete on price..
Your best bet is not to watch ATT, but rather, monitor places like Amazon and Bestbuy around holiday weeekend.. I got the 9930 on a weekend sale at BB for $99..