I got H8 AGM battery from Advanced Auto Parts... there is a coupon for 15% off online - you place an order online to be picked up at your local store - the store did not have any coupons but the online coupon worked!!! I think Auto Zone has a similar deal...

Also, the Advanced sent me "chaser" coupon for $25 off $50 purchase since the original purchase was over $xx dollars - a battery purchase qualifies for the extra $25 off $50 purchase "chaser" coupon... The deal is good until end of December 2013...

you still need to code the battery to the car though...