Can somebody provide me with the $price per GHps in mining since the old CPU days til present pre-orders? I don't mean energy usage or price vs price of btc.. simply hardware costs relative to how fast they hash.
I think this is what you are looking for: https://en.bitcoin.it/wiki/Mining_hardware_comparison it gives a large list of CPU and GPU hardware. It does not give MHS/$ for CPUs, because it is tricky to calculate. But you could estimate the value.
Actual preorder GHS/$ you can find at the mining dashboard: http://mining.thegenesisblock.com/