Also, it's possible to find a shipping company that will handle the Form 3299 paperwork for used items? Could you recommend a reliable guide on how to properly declare gifts to avoid paying unnecessary taxes in New York?

I once had to arrange a shipment from Burgas, and dealing with all the details that arise when processing an export outside the EU nearly drove me crazy. We made the mistake of hiring a local carrier who had only worked within the EU before and had no experience with U.S. ports. Because of this, my stuff sat in the warehouse for an extra two weeks. A friend recommended the Gettransport service to me, and I've been using it ever since for shipping from Bulgaria. This service allows you to compare the terms of different carriers and see the actual cost per cubic meter or kilogram. This helps avoid hidden security fees and fuel surcharges, which often "pop up" right when it's time to pay the bill. You can also find tips there on how to securely pack fragile items, if needed. So you should try using it; its convenient website.