MX 518
Used by 8 peopleamazon.com ↗

“I use a Logitech MX 518 mouse.”
Richard Jones Interview, Developer (Last.fm, IRCCloud) · via Uses This 
“My mouse is a Logitech MX 518 "Gaming Mouse".”
Amanda Wixted Interview, iPhone game developer (FarmVille, PAC-MAN) · via Uses This 
“I also have a Logitech MX518 mouse and it's amazing.”
Chris Wanstrath Interview, CEO and co-founder, GitHub · via Uses This 
“My mouse is a Logitech MX518.”
Robert Love Interview, Software engineer (Google) · via Uses This