Hi. I've recently been trying out aliexpress dropshipping. I have yet to receive my first order. I have a question though. some sellers have something like this in its description: "Please purchase over $10 so we can send it through China Post Registered Air Mai or Correos Economy (with tracking #). If <$10 then we send it through China Post Ordinary Small Packet (No track number)." Does this mean to have a tracking number, purchases have to be more than $10 on that specific aliexpress store or can it be like $10 that consists of multiple items on various aliexpress stores?