$3 Drop. Amazon.com has a Logitech Optical Marble Mouse (USB/PS2) for $17.94. Free Shipping on orders over $25. Reviews are very good. If you need a more comfortable mouse, this may do. n
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- Durable optical technology for smooth precision and resistance to dirt, eliminating the need for cleaning n
- Large, finger-operated trackball for superior control and reduced hand and wrist movement