Update: Deal over.

Microsoft Ergonomic Mouse – Link

Amazon has this currently marked down to only $19.99!

This was selling for $35.37 yesterday and is now only $19.99!

• Next-level comfort. Work all day, with reduced risk of fatigue and injury.
• Precise tracking sensor on a variety of desk surfaces.
• Designed to last — lightweight, durable, and wired for reliable speed and accuracy.
• Multitask your way. Two programmable buttons let you customize For the actions you use most.
• Exceptional control — optimized scrolling wheel for precise web and document navigation.