Yeah, Why is That?
Barry Ritholtz at the Big Picture chatting with Steve Forbes about various things, mentions the following:

We discuss discontinuity of how a movie which costs $100 million dollars to make sells for $10 as a DVD -- yet the CD soundtrack to that same film sells for $18. (Strange things are afoot at the Circle-K).

I'm trying to think of a reason why this might be, other than the record companies are evil, but I got nothing.