Request Operational History: Ask for comprehensive details about the miner’s operational background, like usage period, servicing documents, and any repairs or replacements. You can also decide to return the defective devices to Canaan. In this particular condition, Purchasers pay inbound transport and we will pay the return shipping. Make sure https://refurbished-antminer-z1551728.csublogs.com/46692837/used-antminer-market-insights