Lenovo offers the Lenovo Wireless K5920 Keyboard, model no. 0C51501, for $39.99. Coupon code "USP1AP451501" drops it to $15.99. With free shipping, that's tied with our expired mention from three weeks ago, $24 off list, and the lowest total price we could find. This 2.4GHz keyboard features a mini wireless receiver and ultra-thin design. Deal ends April 29.