^totally agree 1000%

A pc does not use that much power AT ALL. 200$+ is ridiculous to consider for a months worth of usage exclusively from your PC. You'd really need a dual cpu motherboard (overclocked to the very brim), quad sli 580's (overclocked as far as possible) and lots of other power hungry hardware to actually get that kind of electricity usage from your pc and pc alone. AND even under these circumstances, you wouldn't even come close.