Newegg offers the refurbished Logitech K400 Wireless Touch Keyboard, model no. 920-003070, for $24.99. Coupon code "EMCANNN23" cuts it to $16.99. With free shipping, that's $13 under the lowest total price we could find for a new unit. Features include a 33-foot wireless range, built-in 3.5" touchpad, and media hot keys.
A 90-day warranty applies, although it's unclear who backs it.