Cafago offers this Backlit 2.4GHz Wireless Keyboard for $12.05. Coupon code "ZV2892MG" cuts it to $9.30. With free shipping, that's $2 under the best we could find for a similar one sold elsewhere. It features a touch pad, backlighting, 92 keys, and it requires two AAA battery (not included.)

Note: It ships from China and may take one to three weeks to arrive.