巴西采购需求：比特大陆 Antminer S21，比特币矿机，200TH/S，电源，加密货币挖矿，ASIC 矿机

I'm reaching out to place an order for a specific product and would like to get details on availability and pricing. I'm interested in acquiring between two to four units of a model that has a capacity of 200 tons, with the requirement that it supports one device port. Could you please provide me with your best price for the requested quantity, as well as any information on lead times for delivery? If you have any recommendations or alternative options that fit my criteria, I would love to hear about those as well. Looking forward to your prompt response on this!