Did not see this posted after a quick search:
Logitech Performance MX
$57.99 Overstock.com Link: http://www.overstock.com/Electronics/Logitech-MX-Performance-Mo
-$4.06 (7% coupon) Coupon code: 210574
+$1.00 (shipping)
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$54.93
Not sure how long this price will last, and sorry if this is a repost.