Black USB 2.4Ghz Wireless Optical 3 Button Mouse (ReChargable via USB) is just £4.00 inc Free delivery from Ebuyer.com
Features : 2.4GHz Smart Link with 4 Auto-changeable Channels (256 IDs per channel): This is a popular wireless solution for a min. 6 metre operational distance. This creates a non-interference environment and you can freely enjoy the wireless capability. | Mini Slim Dongle: Specially design for notebook users or people working in any limited space.
Smart Link Design: The mouse designs with the unique Smart Link function. Once the link process is complete, you don't have to re-link the mouse even if you change batteries or restart the computer. | 800-dpi Wireless Optical Mouse: The rechargeable wireless mouse built in a 800-dpi high resolution optical sensor that provides excellent sensitivity and precise detection on most surfaces, including wood, plastic, paint, etc. | Rechargeable function via USB cable.
Just to add, it works out £4.99 including vat now i think (12/10/06)