Besides The Record Collector, already mentioned, you should also visit
Counterpoint on Franklin at Bronson, 213-957-7965 (assuming it's still
extant since I was there last March).  Problem with The Record Collector,
if you're buying, is that the massive stock is essentially unbrowsable.
Counterpoint is much better in that regard.

While you're in the neighborhood, be sure to have a couple of world class
chili dogs at Pink's, Melrose & LaBrea.

-- Art Scott
Livermore, Cal.