In the UK
If the Item is bought from another European Union Country the VAT Rate is applicable to the country of origin and NO customs charge. I.e CarTFT's price in Euro's for the Lilliput is exactly what I'd end up paying as it already includes his country's VAT rate. I believe this is why the Non-Eu prices for US customers is lower. I believe paying for VAT in country of origin is the same for ALL EU countries?
If I bought the screen from DigitalWW or Electronicar, then the price
should be
price of item * customs Duty rate (about 4% for TV's, 0% for computer screens) = A
Then (Price A + Delivery charges) * VAT rate (currently 17.5%)
So if hit with both customs and VAT then extra is about 19% on top of the price paid to digitalww or Electronicar. But it really depends on what customs decide to do. Had anything from no extra charges right up to changing the $ to a £ and adding vat, duty and customes handling charge to it
Hence this is why Electronicar try and help by valuing the lilliput at £22 and said it was a computer screen so as to not attract 4% customs duty. Ended up paying No customs duty (0% for Computer screen) and only VAT on £22 declared value + delivery charge so total cost buying mine touchscreen from electronicarfor was £185 to electronicar and £24 to Postal Service.
HTH