Obsolescence of Music CD's

I met some friends at O'Connells, an Irish Bar in Old Town Alexandria, last Friday for a belated St. Patrick's day celebration.  One of my friends had also invited a friend who was in his 70's.  As we were getting ready to leave this gentleman said he was looking to by a good music CD and saw that Olsson's, the music and book store around the corner, had gone out of business.  He asked us if we knew where else he could find some CD's.  Another friend promptly responded "the museum"!