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Very smart question, thank you for it!

My electricity costs are already included in my monthly (flat) rent, so it doesn’t matter how much I am actually burning each month. For the purpose of my mining ROI calculations it is essentially zero cost.

I bought this miner for 0.55 BTC including the shipping. I think it was a bargain. I hope I will eventually break even, but the most important thing for me with this whole mining experiment is to learn and to have fun.

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