As someone who lived in US for decades I can say it is cumbersome and expensive to get parts in Poland. In addition to expensive shipping there is VAT (daylight robbery).
How long has it been since you actually ordered from Digikey, Mouser, or Farnell to Poland?!?
I didn't check Farnell, but Digikey and Mouser both ship DDP incoterms, which means VAT is covered by the seller. DDP means it arrives to you with all customs clearance
done.This wasn't always the case, but has been for a few years now.
Some of the things I want are only on Mouser EU (ships from Chech)
Nope. While they have a sales office there, Mouser has exactly one warehouse for the entire world, and it's in Texas.
Similarly, Digikey has exactly one warehouse for the entire world, and it's in Minnesota.
Farnell has less selection but cheaper shipping (VAT is inescapable).
No, if it's DDP incoterms, VAT is already included.
FYI, while Digikey shows the incoterms right on the screen where you select the country and currency, Mouser's website currently sorta hides it (probably by mistake; it used to be easier to find). But here's how to check without having to put stuff into the cart:
Visit
https://www.mouser.pl/mvc/header/CurrencySelection but replace ".pl" with the TLD for your country.
Now, in some cases (like Poland) it varies depending on shipping method, or even gives you the choice of incoterms. This is accessed by clicking the "More delivery options" link in the cart. The first screenshot shows what it looks like for an example €96 order (i.e. eligible for free shipping, since >€50) on mouser.pl.
As you can clearly see, the default option, the free shipping, is DDP incoterms where you owe
nothing more because it's already been collected.
The current incoterms are also shown in the cart itself, see second screenshot.