Looking for Pi ADC and there seems very little choice

That's not going to go away - its our own beloved HMRC doing that, not the EU. And, once outside the EU, the number of countries that they can include in those games is only going to grow. HMG is short of cash for stuff like the HS2 boondoggle, expanding Heathrow, etc, etc so they're not about to rein in HMRC or sack incompetent civil servants any time soon.

The reason for that is obvious: the RPi and its component parts are all high volume item with all the economies of scale that implies. Any even slightly specialist expansion card is neither, so doesn't, of course attract any economies of scale. Hence the price.

If you want cheap, about the best you can do is look to see if Spark Fun and similar make something you can adapt (you may need to build the interface) or grab a proto board, some chips and a soldering iron and get stuck in.

Why? It was always thus before the EU was a twinkle in anyone's eye.

If we do a free trade deal with the USA then they cant charge duty, or a charge to collect the duty, or VAT on the charge to collect the duty canb they?

Stuff comes in from china using the postal service and no one ever charges duty on it.

Because we can do a free trade deal with the USA

Then importing stuff from the USA will be as easy as importing from the EU now

I don't think the USA has ever run free trade deals that are actually free of all taxes, currency manipulations, quotas etc. They talk a great deal, but then somehow manage to only do deals that favour their own nationals. *mutter* Bombardier C Series US sales ban because Boeing said so *mutter*

In any case, regardless of the above, I don't want to eat US chlorinated chicken OR their feed-lot beef, thank you very much. There is no question that US food was a lot better and more nutritious in the mid '70s than it was 15 years ago (thats the last time I was there) and, judging from comments of friends who've been there more recently, it hasn't improved since then.

Don't mistake overworked GPO staff for an HMG tax change directive.

That's not entirely true, I buy a lot of stuff from China (on both

less) and that comes straight in without customs/VAT etc. but larger items usually *do* get charged VAT etc. For example some brake disks I bought from AliExpress had VAT charged on them, still well worth it though.

IIRC there's a minimum value to attract VAT, for quite a while stuff came out of China with a correct description and a silly low value and didn't get charged VAT then the customs people caught on.