The Logitech® MX Anywhere 2S Wireless Mouse in Graphite is on sale for $49.99 (or less) at several retailers:
Amazon $49.38
Best Buy $49.99
Office Depot OfficeMax $49.99
* Save an additional 50% off a Logitech MX Anywhere 2S Wireless Mouse with coupon code 10575441 when you purchase any monitor, desktop, or laptop.
Staples $49.99