Used it when I had two unRaid boxes. Works great!

Asking $75 + shipping

 

(details from mfg site)

Supports excellent video quality at resolutions of up to 1920×1200 /400Mhz

Features stable video using all-time active DDC/EDID communication

Fully supports Windows 7, Windows 8/8.1 and Windows Server 2008, as well as other OSes

Reliable connectivity with USB-HID devices using Dynamic Device Mapping

 

This new enhanced 2-port USB KVM switch is built with ConnectPRO patented DDM technology. With the advanced Dual-Core technology this KVM can easily be considered the most reliable and stable solution on the market when it comes to switching 100% USB HID devices between multiple computers.

 

1 x UR-12-PLUS KVM Switch

1 x 3A-122WP05-US Power Supply

2 x 6-ft USB/VGA KVM cable

 

https://connectpro.com/product/ur-12-plus/

 

Amazon has the kit new for $140.

http://www.amazon.com/ConnectPRO-UR-12-KIT-2-port-Switch/dp/B003HNF714

One of the best KVMs around. I have two four port DVI versions.