Best Buy offers the Amethyst SuperPig Speaker Docking System for Apple iPhone / iPod in Black for $78.98 with free shipping. That's the lowest price we could find by $51. Sales tax is added where applicable. It features an iPod/iPhone dock, remote control, and more.

Of note, despite the name, it does not come with a cape, nor will it protect you from harm. (In other words, it won't save your bacon.)