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Lots of people tried to buy D3 miners because of the amazing ROI time only 8 days !!!! (actually difficulty will increase a lot after this miners going to work so that 8 day ROI time is going to rise a lot anyways) because of that D3 miners are out of stock but BITMAIN announced there going to have a new batch coming soon.
They also said that for the batch which is coming on 10 august they are only going to accept BTC and LTC.