Import duty seems to be wrong every time if they charge it!
I bought a PulseJet engine from China the end of last year, the declared value by the seller was $30 , I paid $140 including shipping , invoice in box was removed by customs and they then charged me about £300 VAT, no duty....just £300 worth of VAT and a £30 customs clearing charge by parcefarce
To get the jet I paid it....., filled the form in to claim it back as being incorrect, provided documentation and have heard nothing, I dont think I will ever get that back, most expensive china pulsejet ever , I can just about get a quality racing one from Italy for that