My biggest headache is what if I buy an Antminer and it has a defect? That's why I've always been picking GPU over ASIC miners because I know that when I buy from Nvidia or AMD, it's gonna be a high-quality product, while I don't have the same sense for Bitmain. The problem is that if the miner that I bought from China has a defect and I have to return it back, I'll have to pay hundreds of dollars for shipping from my country to China, which isn't worth it for me. Buying from a local market is a bad idea because they sell antminers at double the price.