Lenovo offers the Lenovo Wireless K5920 Keyboard, model no. 0C51501, for $39.99. Coupon code "USP1D431501" drops it to $15.99. With free shipping, that's tied with our August mention and the lowest total price we could find by $11. This 2.4GHz keyboard features a mini wireless receiver and ultra-thin design. Deal ends December 26.