Got a Microsoft Trackball that's about 12 years old.  I stopped using it for about 5 years, thinking it was broken.  Cleaned it up recently to put it on Ebay (they sell for silly money, even broken ones), and found out it was working fine so kept it.  Best mouse I ever had.  Great for zooming the camera on Poser and Bryce.

 

My self-build system - Vista 64 on a Kingston 240GB SSD, Asus P5Q Pro MB, Quad 6600 CPU, 8 Gb Geil Black Dragon Ram, CoolerMaster HAF932 full tower chassis, EVGA Geforce GTX 750Ti Superclocked 2 Gb, Coolermaster V8 CPU aircooler, Enermax 600W Modular PSU, 240Gb SSD, 2Tb HDD storage, 28" LCD monitor, and more red LEDs than a grown man really needs.....I built it in 2008 and can't afford a new one, yet.....!

My Software - Poser Pro 2012, Photoshop, Bryce 6 and Borderlands......"Catch a  r--i---d-----e-----!"