This venerable Valley institution has better than a quarter-century of history under its belt, starting with its hole-in-the-wall beginnings on the old, funky Mill Avenue (back when Starbucks and the Gap were delightfully absent from the entire world). In addition to delivering the area's best cash-or-trade offers for those CDs cluttering up your own collection, Zia on University does a brisk business with the local college crowd, providing excellent turnover even on newer pop releases. But a deeper rooting through the stacks reveals a stock of rich diversity: Looking for that hard-to-find collaboration between Bongwater's Kramer and Penn Jillette? That'll be seven bucks. Also, Zia's topnotch jazz and blues sections make this location much smarter than your average college rekkid store.