I've vented my frustrations about Amoeba in another thread. Their used vinyl stock has dwindled in the past few years in favor of new LPs priced higher than anywhere else around. You should hold out for branches of Freakbeat or Atomic Records (like Captured Tracks in Brooklyn but much better stocked). I keep imagining Tokyo's Disk Union might open a branch in LA; I know it's extremely unlikely but apparently they have a few buyers based in the Bay Area. The rumor started here!