Dell Small Business offers the Dell Bluetooth 4.0 Twisting Mouse, model no. WM615, for $49.99. Coupon code "8SKPHRWW8N4RV0" cuts it to $44.99. With free shipping, that's the lowest total price we could find by $5, although we saw it for $5 less last month. It features compatibility with Windows 8 and includes three AAA batteries. Deal ends May 4.