The full price for the average cd is about 13 dollars US. This is probably a low estimate, but it gets the job done. This gets you a nice case, insert and cd. Now, 5 is roughly 39% of 13. Therefore you can expect about 39% quality of the original. They cant omit songs that were on the original cd, and if the case was heavily damaged, no one would buy it on visual apperance alone. Therefore, the insert is the best place to save money.

Personally, Id buy a cd with no case, no insert, slip it into my cd book directly and be done with it if they would lower the cost but chances are, the bastards would double it..