The cheapest I've seen this mouse so far is $19, but now it is listed at $15.
It is a great mouse; I've used one before and it is very responsive, very comfortable, and it is very tidy as the micro USB receiver fits inside the mouse when not in use.
..the only catch seems to be that you must buy 2. Who wants to go halves with me? I'm in Melbourne CBD!
Hard not to neg this!