Amazon has Logitech MX Vertical Advanced Ergonomic Mouse (910-005447, Graphite) for $77.87. Shipping is free.

Best Buy has Logitech MX Vertical Advanced Ergonomic Mouse (910-005447, Graphite) for $78.99. Shipping is free.

Features:

• Natural handshake position
• 57° vertical angle for improved wrist posture
• The 4000 DPI high-precision sensor results in 4x less hand movement and reduces fatigue. The cursor speed switch instantly adjusts DPI speed and accuracy with the touch of a button
• Connect MX Vertical via the included Logitech Unifying receiver, or Bluetooth
• MX Vertical is shaped for the human hand and smooth to the touch. Its unique form fits a variety of hand shapes and sizes, and the textured rubber surface assures a natural grip