Multi-Function1002 via eBay offers the Aluminum Bluetooth 3.0 Keyboard Case / Stand for iPad for $22.49 plus free shipping. That's the lowest total price we could find for a comparable aluminum keyboard case by $3. (For further comparison, it's tied with our mention of a similar Bluetooth 2.0 case from last week.) It features a built-in Li-Ion battery. This case can be used with iPad 2, 3rd-generation iPad, iPad with Retina Display, or iPad mini