This deal has ended.
Dick's Sporting Goods has this Under Armour Varsity Backpack plus iSound speakers for $49.99. Shipping is free on all backpacks $49.99 and up. This backpack is priced at about $50 almost everywhere, so with free shipping and the speakers (elsewhere as low as $18) this is a good deal. The backpack has straps to fit the shoulders and minimize back stress, and is made from ballistic nylon so it is very durable. Sales tax is charged in states with DIck's retail locations.