Meritline offers the open-box Microsoft Wireless Mobile Mouse 3000 in Black, model no. BX3-00008, for $13.99. Coupon code "MLCK725RNL1" cuts it to $7.45 with free shipping. That's $4 under our mention from four weeks ago and the lowest total price we've ever seen. (It's also a current price low by $6.) This 4-button mouse hides a tiny snap-in USB receiver that plugs into your computer.