[DEAD] Logitech M510 Wireless Mouse for $15

As of 9/21/16 re-check, the price increased to $20…
If you like mice with side buttons, and simple non-fancy design, the Logitech M510 Wireless Mouse is on sale for $15 each, in new condition, at Amazon.com in the blue color scheme (limit 3, Prime Only) and the black color scheme (limit 5, open to everyone).

The side buttons function are Back and Forward, which is handy if you are a web browsing power user or use that feature in spreadsheets and such. They have a pretty decent review profile, they average 4.4 out of 5 based on 8200+ customer reviews. This is an RF wireless with a nano receiver. Not bluetooth.