Given that Bitcointalk is hosted from the US, and the item in question was in the US, US law is far more relevant than whatever the customs in your country are.

This isn't off-topic - in fact it is the crux of the matter. Ignoring all the PMs, the he-said-she-said, trading neutrals and negatives and all the rest of it, you performed a dishonest act and were tagged for it. That's all that is relevant as far as I'm concerned.