Hi, I'm trying to buy another Mac with back to school promotion- I'm trying to buy it in Delaware where there's no tax on the electronics. However I won't have time to go, so a friend of mine decided to go for me. The question is, can someone else (who is NOT a student) buy Mac with back to school promotion with my ID? Would I have to give him like a grant letter? Or not possible at all? Does anyone know? Thanks!