I dunno, Tracy. My Nav.B Chrono was delivered on Saturday and I haven't gotten a tax/duties notice, yet. I will post up here when I do.
You'll probably be better off ordering through Gunter in Germany, though. Keep in mind his prices are inclusive of VAT, so he gives you a 15% discount to help offset that tax, so you'll actually only pay 85% of the published price on the Steinhart website. I think he even gave me 15% off the shipping, as well (just subtracted 15% from the total including shipping, IIRC).
Good luck, they are wonderful watches!