Yes I do... i mean its not special its just that you can't hardly get them anymore anywhere... Its the original Logitech Mouseman (manuf # S-38). 3-buttons. No scroll wheel. By far the BEST mouse I have ever felt in my life. It uses a ball and its PS/2 connection. Its a very difficult mouse to find and no one else makes anything that comes close to it anymore in terms of 'feel' for me. The big huge laggy optical mice of today just don't cut it for me...
The closest alternative is the Logitech Wingman Gaming Mouse that Logitech released several years ago (in 1999 or 2000). It was the same exact shell as the S-38 but it was also USB! Anyways, this mouse is even more difficult to find now than the S-38.
Anyways, I have several S-38's sitting around ready to be used by me someday when my others go bad so I was wondering how hard it would be to buy a normal optical mouse and hack its guts into the S-38 shell....
Sounds like pain in the butt? Yeah it is... but I love this mouse
Here is a pic of what the shape is:
http://store1.yimg.com/I/toolspcs_1804_5905468