南非采购需求：比特币矿工，云挖矿，加密货币市场，加密货币市场，蚂蚁矿机，Bit Main

I'm interested in your products and would like to get an idea of your pricing structure. Specifically, could you provide me with the wholesale unit cost for the items I'm looking at? The listed price is R300, but I'm curious if there's any flexibility or discount for bulk purchases. Additionally, I'm located in South Africa, so I'd appreciate any information regarding shipping options and lead times to this region. Also, please let me know if there are any capabilities or features related to the device's ports that I should be aware of. Looking forward to your detailed response!