They're missing a monitor, keyboard and mouse. Also speakers.. This is a good setups assuming you have all those parts laying around and not being used by any

They're missing a monitor, keyboard and mouse. Also speakers.. This is a good setups assuming you have all those parts laying around and not being used by anything else. Otherwise you might also need to get a KVM to share those peripherals. The missing peripherals will probably add at least $100 to the total.