Amazon currently has the Borderlands 2 Season Pass 25% off. If you still need the DLC on steam now is the time to buy it.

Here is the link. http://www.amazon.com/Borderlands-Season-Pass-Online-Game/dp/B00945156U/ref=sr_1_1?ie=UTF8&qid=1361584758&sr=8-1&keywords=Borderlands+2+Season+pass

If anybody plans on purchasing this enter the code CAGROCKS at checkout you might be able to get an additional 25% off.

Edit: It seems the game itself is on sale as well. Here are the discounts for each version of the game.

PS3 - 35% off
X360 - 33% off
PC Physical - 33% off
PC Download - 25% off
Mac Download - 50% off