Start with the US destination, not only the product link
A link or spreadsheet row is only the first step. Before ordering, save the live seller page, selected color, size, option text, domestic delivery note and estimated item weight. This keeps the later warehouse record connected to the exact item you intended to buy.
For a US parcel, compare product price, domestic delivery, service charges, currency conversion, international shipping, optional insurance and possible import-related costs together. The cheapest item listing is not always the lowest delivered cost after the parcel is measured.