Currently on the phone with the Pittsburgh Saks LV store... they said that if the destination zip code is within a 10 miles radius of an LV boutique (any LV boutique, not just a Saks LV), then sales tax would be charged... if the zip code is outside of the 10 mile radius, then no sales tax!
And... DARN! The Union Square (SF) LV boutique is 9.5 miles away from my home!
Can you have it sent to a relative or friend's house or workplace?