tickets to the alhambra in granada

can we purchase them at the bbv in madrid three days prior to going to granada

I believe you can, but you'll find the detailed answer in the Valencia and Granada thread in the "Favorite Places" forum as well as in the Best places to see in the south thread of the same forum. I used the SEARCH feature located above and to the right. Have a great time!!!!

Saludos, MadridMan