A few comments from an expat... Ask if the business is VAT Registered. That's a prerequisite to being able to deduct VAT from a sale outside the EU. Most businesses over a certain size will be, but cottage manufacturers, for example, have such small turnover that it's not worth their while. Some companies may charge a processing fee for the VAT refund, so also ask if they do that.
Secondly, the stated value on customs forms is well below the threshold for any kind of duty once the package arrives in the US. It might sit in customs awaiting inspection for a while, or it may sail through. That's the luck of the draw.
Finally, tracking your shipment is expensive and not very meaningful is you go the Royal Mail / USPS route. I had $300 item shipped to me last year from the UK, without tracking, and it disappeared without trace. The company agreed to send me a replacement at no cost, and this time added tracking, but all I could see - days after the event - was when it left Royal Mail's jurisdiction, and that it had been delivered. Depending on cost you might want to check out DHL, UPS or FedEx courier options. It's a balancing act though, as I know UPS from Canada has an additional fee for customs...