This is one of those postings from someone who doesn't pay much attention to addresses, but here goes. Start at Puerta del Sol walking west down c/ Arenal. Go three blocks on your right to c/ de las Hileras and turn right. The store is on the right (east) side of the street. They have thousands of used CD's, with original (opened)packaging. The big drawback is there is only marginal organization to it, you need to look at every single CD! I have purchased many CD's there over the years of all musical styles.

Warning-These directions were done from memory, using a map of Madrid (something I seldom use when there) It may be a block east or west although I am sure it is to the right off Arenal. I will correct if necessary when I am there next month.

Matt