Ebay offers ZAGG Universal Bluetooth Keyboard & Stand for $15 (reg $40) with free shipping.

Product Description: 
The new ZAGGkeys Universal Bluetooth keyboard is the most versatile keyboard available. Its innovative programming, together with its case that doubles as a stand, allow it to work with virtually any tablet or phone on any operating system. Whether you prefer Apple, Android, or any mobile device in between, the Universal's ergonomic curved shape will provide lasting comfort for all of your keyboard needs. Island-style keys, similar to those of traditional keyboards, provide enough room to keep you comfortable and typo-free. The Universal also features a battery that lasts up to three months of normal use between charges so you can go anywhere prepared for work or play.

• Compatible with virtually any tablet or phone on Apple, Android or Windows
• Ergonomic design and island-style keys provide a comfortable, more natural typing experience
• A protective case doubles as a stand for convenient set up and portability
• Rechargeable battery lasts up to three months of regular use 
• Up to 30 feet Bluetooth Wireless rsnge
• Simple toggle switch allows you to select your operating system : iOS, Windows or Android
• Durable protective case doubles as a stand for convenient set up and portability