This is correct. The US is charging the sales tax and customs is charging the import tax. If you present in person to certain countries you can file for a local tax refund, but when you buy something through eBay or Vestiaire (sites thay have USA presence as well as international will charge you for local sales tax according to your zip code) and customs when it is physically coming into to the country from another country. You will not pay additional customs fees when it gets to customs and it goes through automatically (where if you buy on eBay - not through global shipping- you pay customs when it gets to customs). Vestiaire and I believe also Ebay global shipping both charge a customs fee + shipping service (eg FEDEX) brokerage fee, so you don’t have any more to pay and it sails through customs without a hitch in 99.9% of cases. If I buy some thing on eBay that actually goes through customs normally, the fee may be slightly lower, but it always sits in customs for days to a week, they always need additional paperwork from me which takes quite a long time to fill out, they require a lot of personal information from me, they often require very detailed information about the item that I may not have, like the species of Origin, where it was harvested etc. In that case, I will need to wait on hold with customs and FedEx for so long and fill out so many forms, always with the pressing threat that it will be sent back if I don’t get them all of the information in time, so I think it’s OK to use Vestiaire and pay a slightly higher amount to have it facilitated through customs by the shipper.