Meritline offers the refurbished Logitech MK520 Wireless Desktop Keyboard and Mouse Combo, model no. 920-002553, for $29.99. Coupon code "MLCK117VNL1" cuts it to $22.99. With free shipping, that's $4 under our September mention of a refurb and the lowest total price we could find by $5. It's also $17 below the lowest total price we could find for a new unit. This mouse and keyboard set features an ergonomic design, 2.4GHz wireless connectivity, and more. It purports up to three years of battery life for the keyboard and one year for the mouse.

Of note, no warranty information is provided.