both were new, and their declared price corresponded to their real market price.
there was nothing about "used" or "second hand" on the customs declaration, only the model name.
the whole point of all my messages in this thread is that the import tax/duty in Thailand is absolutely random and depends on the mood of the customs officer inspecting your package.
yet I must add that if you ship by the courier service such as DHL, UPS, FedEx, you will have a much higher chance to get taxed (and sometimes even over-taxed) rather than when shipping by the usual postal service or EMS.