Poppy9780 via eBay offers the refurbished Logitech Solar Folio Keyboard Wireless Case for iPad for $14.99 with free shipping. That's $75 off list and the lowest price we could find. It will fit the iPad 2, 3, or 4 and features a solar-powered Bluetooth keyboard.

Note: A 90-day warranty applies, although it's unclear who backs it.