This is my same post from the thread dedicated to purchasing Zelda: TP from SecondSpin (why does that thread exist anyway?):
SecondSpin is my favorite used media source. There is one a couple of blocks from me in Costa Mesa, and I buy from used CDs from them almost exclusively, both in-store and by internet order. I have never bought a game, but a large portion of both my music collection and my DVD collection is comprised of Second Spin purchases.
They are not a "no-name company that no one has ever heard of"; they only accept near-perfect CDs/DVDs and I have never had a bad disc. They are akin to Wherehouse. In fact, I am fairly certain they are coordinated with Wherehouse - their items ship in the exact same fashion as Wherehouse items, with the items shrinkwrapped with an orange tab that says "used" over the shrinkwrap, then sealed in contact-stick bubble wrap.
Trust SecondSpin.com.