I have ordered an Innosilicon from asicminersale.com a month ago, I paid US$5200 by ethereum, I did not know that was a pre-order, I made a mistake, so I asked for refund, asicminersale.com quickly replied, and refund the money to me immediately in my wallet address, I am so glad that they are such honest and responsible company. I am here to highly recommend this company as bitcoin miner seller.