I've written a preliminary statement regarding US trade tariffs on Minifree's website:
https://minifree.org/shipping.html#us-trade-tariffs
Minifree sells Libreboot computers.
Since 2 April 2025, Trump's government has imposed higher trade tariffs on imports from around the world.
The tariff for imports from the UK is currently 10% with most goods; cars are 25%.
US customers need not worry. It's likely that the courier will tax you during shipping, and send you an invoice. Like how import VAT works in the EU countries.