I went there for work a few times years ago (maybe 15 years ago). So this may be out of date. I liked Waterloo Records. A nice selection of new and used LPs and CDs. A few good used record stores on Guadalupe, across from the university. 6th Street music district was great for live music. I could stand on the sidewalk and sample what was playing in any given bar, then decide if I wanted to go in.