not trying to doubt ur SE's words, but whatever he said defies convenotional logic since we bought ex-stock, so the vehicle should already cleared customs and in fact already in the warehouse awaiting purchase and registration.
there is also no point for TCM to declare higher OMV since it would mean they have to pay more taxes, while selling to us cheap. why would they want to do so and diminish their margin?
don't mind telling us what your OMV is when you collect your car? would be a good reference..