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http://ebay.com/itm/311208971212
40% off the sellers regular price
Seller has 99% positive feedback with 33k+ reviews, and the mouse ships from the US unlike many of these similar mice which ship from China.
For comparison, $ 13 at amazon with great reviews: http://www.amazon.com/ZELOTES-Bla…B00QI6SJ6
Seems like q pretty unbeatable price for what looks to be a good quality gaming mouse with some decently advanced functionality.