hello, I am a student from Europe, on my vacation in Florida. Since the exchange rate is pretty nice these days, i would like to buy a macbook air 13" 256GB. Does anyone know an onlineshop which has them available, but doesn't charge sales tax? or do you think when i'm going into an apple store and i'm showing them my european student id, they may give me the student discount and the Mac App Store 100$ card? thanks for your help!