Meritline offers the Logitech M505 Wireless Laser Mouse in Silver, model no. 910-001316, or Red, model no. 910-001326, for $19.99. Apply coupon code "MLCK803RNL1" to drop it to $15.99. With free shipping, that's the lowest total price we could find by $5, although we saw it for a buck less via pickup at Staples back in March. This 2.4GHz wireless mouse features a unifying receiver which can support up to six compatible devices. Deal ends August 4 or after 100 coupon redemptions.