Ask HN: Your Average Cost for a Virtual Machine

If you or your employer has deployed a virtualization platform, what is your average capex cost of a single virtual machine? In other words, how many dollars were spent as a capital expenditure on the infrastructure, and how many VMs was it designed to run concurrently? I imagine the answers will vary from $10/VM (VM not consuming much of any CPU/disk/network resource, just RAM) to $1000/VM.