Posted by BruceM on Nov 04, 2016; 3:36pm
URL: https://www.es-forum.com/Anyone-else-forced-to-use-an-old-style-ball-mouse-tp4029912p4029928.html

The CH Products Trackball Pro is available for a stiff price at:
 http://www.trackballworld.com/ch-products.aspx
I expect it can be found elsewhere for less.  

This one appears to be mechanical also:
https://www.amazon.com/Infogrip-Inc-12000005-BIGtrack-Trackball/dp/B0006ZM7VY#Ask

Despite the claims of "laser precision" this is also mechanical:
https://www.amazon.com/CST2545W-L-TRAC-Wired-Performance-Trackball/dp/B00ECHGE3O/ref=pd_lpo_147_tr_t_3?_encoding=UTF8&psc=1&refRID=1S96W54GE7SNAX1V2DM2

Trackballs are not for everyone and obviously old mechanical mice are a bargain in comparison. But I have MS and they are a marvel for me compared to mice.  I have been using my original modified CH Products Trackball Pro for over 20 years. I have replaced the 1/8" steel shafts twice (a common RC car axle) in that time.