Meritline offers the refurbished Logitech M510 Cordless Optical Mouse, model no. 910-001822, for $18.99. Coupon code "MLCK618DNL1" cuts it to $15.99. With free shipping, that's a buck under our mention of a refurb from last fall and the lowest total price we could find for a refurb by a buck. (For further comparison, we saw a new unit for pickup for just $2 more in January). This wireless mouse features a nano-receiver, ergonomic design, and more. Two AA batteries are included. Coupon expires after 100 uses.

Of note, no warranty information is available.