How Much Does a Wireless Mouse Cost?

This is like the sort of car equivalent of byna, sort of like superlo racer with lights underneath it. An painting them with tippex, can you configure the buttons? Cause you goat to two side buttons that are traditionally back and forward in the browser. I would not spend 35 pounds on a mouse. Well, yet, i normally spend five. And my mouse is shit. So i really need a new one, but it nees to be wireless.