Mwave offers the Linkskey 4-Port Dual Monitor KVM Switch
, model no. LDV-DM204AUSK, for $299.99
with free shipping
. That's the lowest total price we could find by $42. This switch is designed for sharing two displays between four multimedia computers with dual head (DVI+DVI) display cards. It features two USB 2.0 hub ports, two USB device ports, four USB type B ports, five 3.5mm audio jacks, five 3.5mm mic jacks, LED indicator, and user-definable hotkeys.