Amazon is offering Etekcity Scroll Endurance Optical USB Wired Ergonomic Vertical Mouse for $10.99 plus Free Shipping w/ Amazon Prime. Enter code ETEK1234 at checkout.
http://www.amazon.com/gp/product/B00KRDU2NU
http://www.amazon.com/gp/product/B00KRDU2NU
- Unique ergonomic design with removable palm rest to reduce hand and wrist pain and help prevent CTS
- Two thumb buttons for quick back/forward browser navigation and clickable scroll wheel
- Quick DPI shift button: 600 / 1000 / 1600DPI for seamless transition between users and applications
- High-resolution optical sensor with adjustable sensitivity for accuracy and responsiveness
- 1 Year Warranty by Etekcity; Compact size and excellent sensitivity, convenient to carry and easy to operate