In US practice, used goods are generally classified under the same HTS heading as their new counterparts, with the 'used' condition noted in the schedule where relevant. The duty rate is therefore driven by the product's material and function, not by a separate 'used goods' rate. Some headings do have specific provisions for used articles that carry different rates, so checking the applicable tariff schedule notes is important.

Yes. Shipments valued at or below the current de minimis threshold (Section 321) may qualify for informal entry and duty-free treatment regardless of whether the goods are new or used, provided they meet all other admissibility requirements. Importers should verify the current threshold and any applicable exclusions, as certain product categories are excluded from de minimis treatment.