If you are in the market for a good 4-port, PS/2 KVM switch. $91 + $8 s/h.
Miniview SE 4 Port
This uses the same parts as the Belkin Omniview 4-ports, which unfortunally means it also makes that terrible buzzing noise when you switch PCs. It can't be disabled. But unlike the Belkin, it comes like cables. It is normally hard to get a good deal on KVMs; they're aren't CPU. For comparision, Amazon.com has this for $129.99.
Miniview SE 4 Port
This uses the same parts as the Belkin Omniview 4-ports, which unfortunally means it also makes that terrible buzzing noise when you switch PCs. It can't be disabled. But unlike the Belkin, it comes like cables. It is normally hard to get a good deal on KVMs; they're aren't CPU. For comparision, Amazon.com has this for $129.99.