9steals via Amazon offers its Prime members the SHARKK Bluetooth Keyboard for Google Nexus 7 Tablet
with free shipping
. That's $3 under the lowest total price we could find for a similar Bluetooth keyboard elsewhere, outside of the price below. It also works as a stand and includes a lithium battery and USB cable.
A close price: All4Cellular charges $19.95 with free shipping for a similar keyboard.