lol, yeah everybody is on 15c electricity, what a happy world. Except u r full of BS. My own electricity is 19c, and I'm in US. The poster ALREADY SAID $7 is his equilibrium point (if his equilibrium point is $7, that means he's paying $210 in electric for 30 BTC), guess what? now the price is $6.5, that means he's mining unprofitably if he's still mining, which makes my analysis completely correct. So unfortunately you are the one spewing BS.
For example:
to mine 30 btc, you'll need to pay $200 in electricity (roughly)
That's completely wrong. Let's take one of the most inefficient cards when it comes to electricity the 5830. A 5830 at most requires 200 watts and at the current diff it mines 0.1867 BTC a day. That means it would take 160.68 days to reach 30 btc. Using the average electricity cost for the united states which is 15 cents per kwh it would
cost $115.69 dollars not $200.If you use a more efficient card on electricity it would be even lower. If your electricity costs less then 15 cents per kwh it will be lower.
Get your facts straight before you start spewing bullshit.