Bestbuy offers Logitech - K580 Multi-Device Chrome OS Edition Full-size Wireless Membrane Keyboard - Graphite for $22.99 (orig. $49.99) +Free Shipping.

Product Description:
Type on your Chromebook or smartphone for effortless multitasking with this Logitech slim wireless keyboard. The built-in easy switch lets you pair and alternate multiple devices quickly, while the slim keys offer a comfortable, quiet typing experience. This Bluetooth-enabled Logitech slim wireless keyboard includes an auto-sleep feature that is activated when you're not typing to ensure long battery life.