newegg.com offers the Rosewill 4-Port USB KVM Switch, model no. RKV-4UC, for $34.99. With free shipping, it’s $5 under last month’s mention and the lowest total price we’ve seen.
This self-powered KVM lets you manage four computers (Mac or PC) with just one keyboard, monitor, and mouse.
It includes four sets of non-detachable cables.