Best Buy has an Apple genuine iPad dock for iPad 2 and 3 for only $7.99 with free shipping. This unit sells for brand new at Apple for $29. Please note this item is refurbished, but honestly… how much can you refurb a dock? Best Buy refurbished products are typically in great condition. The item description on Apple.com states this product will work with both iPad 2 and 3.
Please note this item is also available for the first generation iPad.