HavitDirect via Amazon offers its Havit 2.4GHz Wireless Optical Mouse in Black for $9.99. Coupon code "GKS5P7IJ" drops it to $4. With free shipping, that's tied with last week's mention, $6 off, and the lowest price we could find. It features a 1,000/1,500/2,000 adjustable dpi and 49-foot operating range. Deal ends January 21.