VicTsingDirect via Amazon offers Prime members the VicTsing MM057 2.4G Wireless 6-Button Mouse in Black for $9.99. Coupon code "IK5LW5NN" cuts it to $5.99. With free shipping, that's $2 less than our March mention and the lowest price we could find by $5. It features up to 2,400 dpi and purports to have up to a 15-month battery life.