Amazon has the Logitech Anywhere Mouse MX on sale for $59 - $6 off with coupon code GXTPOFES - $15 rebate [Exp 7/31] = $38 with free shipping. Features the new Logitech Darkfield Laser Tracking technology which claims to work on glass and uneven surfaces. Includes Logitech Unifying receiver, 2 AA batteries, and carrying pouch.
Good deal here. I haven't seen these for less than $50 until now.
I'm wondering who tries to use a mouse on uneven surfaces?