Which is absolutely not true at all. Go ahead, order a bottle of ink from P.W. Akkerman in The Hague and you'll see why. If you want to sent it to the USA it will cost you more than 20 euros to do so. More than what the product costs.
The reason for this is really simple: rules, regulations and taxes. One simply does not import nor export a product to whatever country in the world from whatever country in the world. It is nearly impossible to import rare earth metals from China. Why? Because of rules and regulations that China imposes on these things. Since these are rare and difficult to come by they are also very costly. That's why a customised Mac ships from China and not from Apple USA.
These rules, regulations and taxes are all meant to protect ones own interests (economy, jobs and so on). Chinese companies are dumping solar panels on the markets right now for very low prices. They can because the Chinese government is backing them. This causes problems for local manufacturers elsewhere because they don't have that backing and can't lower their prices. Lowering their prices would make them go bankrupt, letting the Chinese dump them for lower prices does the same thing. The EU wanted to do something about that and raise the prices of the Chinese panels. Except that causes a big problem in countries like the Netherlands. A lot of people are buying panels because they are cheap and they are hiring other companies to install them. If the prices go up then people won't buy the panels and not hire those companies. Those companies will go bankrupt. So they settled somewhere in the middle.
If the EU didn't do this then a lot of people would have lost their jobs due to companies going bankrupt. Unfortunately these things are also used in politics. The most known example are the UN resolutions against countries like North Korea and (more recently) Russia. And yes, companies will find a way to circumvent those but it'll drive the cost of the product.
This means that for some products you pay more in your own country than abroad. This principe applies to every country in the world including the USA:
Bush slaps tariffs on steel imports (exactly the same as the solar panel example from the EU).