This is affecting many, you are not alone.
This is the latest announcement from eBay re the issue with posting to the States because of these tariffs.
Hopefully the link there to ' this page' will keep you updated with any changes:
Starting 3 April 2025, new US Customs policy will impact shipments from the UK to US buyers. US customers will now be responsible for additional duties on most orders over $800, and they may need to provide further tax information for customs clearance. This could result in shipment delays due to US Customs processing. To address these changes, we are actively updating Estimated Delivery Dates to offer better arrival estimates.
Staying Informed
This page will keep you updated, particularly regarding the impact on UK sellers.
We’re closely monitoring how these new US import requirements affect buying and selling on our marketplace. We only succeed when you succeed, and we’re here to navigate these changes together.
@toffeegirl65