http://www.pcgamer.com/black-friday-mouse-deals/

A good gaming mouse is an extension of your hand. It's an instrument of destruction… and office work. You get the gist: it has a sensor and ergonomic design great for gaming, and is comfortable to use for long periods of time, too. We've tested dozens of gaming mice and have favorites from Logitech, Razer and other mouse companies. These mice can sometimes seem a bit pricey compared to the cheap, crappy alternatives out there, but we think they're usually worth the price. Thankfully, Black Friday sales mean you can get a great mouse for less than you'd spend the rest of the year.

The Razer DeathAdder is still one of our favorite gaming mice, and it's available on Amazon for $50 this week. Its 16,000 DPI optical sensor is great, and the shape is simply the best around no matter how you hold a mouse.