As one of its daily deals, Amazon offers the Logitech MX Master Wireless Mouse in Black for $49.99 with free shipping. That's $10 under our mention from May and the lowest price we've seen. (It's also the best deal we could find today by $10.) This mouse can connect to your computer via the included unifying receiver or via Bluetooth and features a 1,000 dpi movement resolution, speed-adaptive scroll wheel, thumb wheel, Darkfield laser sensor, customizable buttons, and rechargeable battery with up to a 40-day life per charge. Deal ends today.