Here is what I don't understand: The music industry does not follow the economic law of supply and demand. If demand for something is low, then the price of the CD should be lower, but it isn't! Now as an example, I listen to a heavy metal artist named King Diamond. Nobody listens to this guy, he paints his face and sings about satanic crap (it's kinda funny.) Here's a picture of King Diamond so you can get a general idea of what I'm talking about:
haha, I saw King Diamond at the Capitol Theatre in Flint, Michigan, several years ago.
A friend of mine has every King Diamond album and he doesn't pay $18.99 for them. Going to a upscale record chain that charges way more than anyone else for the same product isn't "the music industry". That is you, if I may say so, being dumb enough to pay $18.99 for a CD that sells elsewhere for $14.99.
But, since you mention supply and demand, here's how it works: King Diamond fans like to buy King Diamond CD's just as much as N'Sync fans like to buy N'Sync CD's. King Diamond fans want King Diamond CD's just as much as N'Sync fans want N'Sync CD's. Looking at raw sales volume has nothing to do with it.
Each market is governed by its own supply and demand forces. To their respective labels, King Diamond's market isn't N'sync's market. They don't discount King Diamond CD's because they sell a lot more N'sync CD's, nor vice versa. They will only discount King Diamond CD's when King Diamond CD's start selling poorly, not in comparison to N'sync's market, but in comparison to Kind Diamond's market. In addition, I presume N'sync and King Diamond are on two completely different labels, each with different expense/investment/profit structures.
Further, let us suppose the following oversimplification is true:
Record Company A invests $20 million into N'sync
Record Company B invests $500,000 into King Diamond
Obviously, King Diamond sells but a fraction of the albums of N'sync. In that case, the cost of the album may have to be the same in order to recoup your investment + the same profit margin because, though you've invested a whole lot less, you're also selling a whole lot less.