Best Place to Find CDs for Your Roadtrip in New Zealand

"Lately I've found myself taking long road trips in rental cars where the radio stations can get a bit dodgy.  So you might say I've become obsessed with scouring record stores' bargain bins and previously-owned sections for quality CDs to bring along on my next trip. Most of the stock in Lo Cost is new, and understandably a bit higher than my appointed price range, but their smaller selection of used CDs is quite varied. Definitely a worthwhile stop while you're strolling along Jackson St."