I've bought quite a few things from abroad - including the US, Germany, the Far East. The small firms (eg butterfly exporters in Thailand) didn't always warn me about customs duty. The more professional firms did warn me about customs duty. However, they told me it would be my responsibility to check the exact level. I think that's fair enough, why should any trader be expected to keep up to date with every piddly customs rule in every country in the world?
I will agree that it is a good idea to find out the charges in advance. I imported an expensive motorcycle component from America without checking. I forget now exactly how much UK customs charged me, but it spoiled my day I can tell you.
In the future, if I buy something easily portable like ZenRay 7x36s, I
might be
tempted to wait till someone I know is visiting the US and get them to bring the item back as personal luggage. Unethical, I know.
Julian: Here's what ZenRay have to say if you click
Shipping & Returns on their website:
For Customers from outside US
Please be advised that there might be additional duty and/or tax and/or handling cost that are charged by your postal and custom authorities. As an importer, you will be responsible for those potential charges. Those charges vary from country to country. Please check with your local custom authority to find out what charges might be applicable to your purchase.
They can't make it clearer than that.
I'm amused that you think that UK consumer legislation extends to transactions executed in the USA with a US company.
Firstly, this isn't what Julian said (or presumably thought). Secondly, whilst I agree with most of what you say elsewhere, I think you might find that the country that tries hardest to impose its own rules on other countries is.... well, maybe you can guess. I will however concede that the EU, a non-country, is a major offender too, possibly even worse. Derail/off.
PS Airgee: This would normally fall to a more long-established member of birdforum, but since no-one else appears to have noticed that you've just made your first post (and an informative one at that), let me say...Welcome to birdforum. To the binocular section especially.