selling a single monitor , 4 computer KVM from level one techs . Retails at $575: https://www.store.level1techs.com/products/p/hdmi-21-kvm-wedid-serial-control-single-monitor-four-computer
Great KVM, bought early this year and only used for a few days. Like new, with manual. Selling bc I had to change setups and no longer need.