As one of its daily deals, Amazon offers the Logitech MK710 Wireless Keyboard and Mouse, model no. 920-002416, for $44.99 with free shipping. That's $5 under yesterday's mention and the best price we've seen for a new unit. (It's also a current price low by $25, outside the price below.) This set features ergonomic design and 2.4GHz wireless. Deal ends today.

A close price: Best Buy offers it for $49.99 with free shipping.

Orders placed at Amazon by December 19 are guaranteed to arrive in time for Christmas.