As the title states my question would be:
Does ordering Kindle in the US (to be delivered to an address in Miami) from amazon.com really have extra taxes / bigger price then the one listed on the product page? If that is actually the case why is that the case?

= Why isn't the actual price for the chosen delivery address / city / state listed on product page itself?
I was planning on ordering a Kindle Paperwhite Kids bundle (listed as $159.99) while my brother is in Miami and have him carry it when he return back to Europe (to Serbia, so no shipping from amazon.de and ordering from amazon.com when in stock [which looks to be rare occasion for new Kindle models] has an absurd amount of customs/import fees).
Only at checkout I've realized that the total price has $11.20 in taxes,
in addition to listed price of $159.99.
Obviously I'm not a US resident neither is my brother...
Last November when I've order basically the same product (Kindle Paperwhite 5, with ads / "special offers") but on amazon.de to be delivered to an address in Germany the listed price on product page was the total price
including VAT.