Thanks Bitmain for your reply,
So you are saying that each package will have its own invoice. If that's the case, then orders of 2 x S3s should still be each S3 packaged with its own single value on its customs note.

Edit, sorry, I would have thought that package type, or single packages need individual invoices, therefore separate values from any of the other 100 or so packages coming into customs.  

Or are you stating that even if we order 100 separate packages to the single shipping address, all the values of the combined packages add up for import tax purposes?