What shop would you spend all of your money in if you could?
I'd undoubtedly spend mine in a Danish shop chain called "Stereo Studio" -they basically sell music, movies and console games. They're usually cheap and specialize in selling the more rare CDs/DVDs as well as the popular ones. I don't think there's ever been a CD/DVD I haven't been able to find in one of their shops.
Also, book shops ftw.