Meritline offers the refurbished Logitech MK520 Wireless Desktop Keyboard and Mouse Combo, model no. 920-002553, for $29.99. Coupon code "MLCKB22SNL1" cuts it to $23.99. With free shipping, that's tied with our April mention of a refurb and $11 under the lowest total price we could find for a new set. This mouse and keyboard set features an ergonomic design, 2.4GHz wireless connectivity, and more. It purports to have up to three years of battery life for the keyboard and one year for the mouse.
Of note, no warranty information is provided.