It is a good idea, imagine buying an album and selling the tracks you don’t like.

I have thought about this before, in fact I just opened up a whitepaper on the idea – (domain still free).

You have a fundamental right of ownership of a possession, so in theory it should be able to be re-sold, traded, lent, or given away by its owner.

However my idea was predicated on transcoding DRM formats going between different store formats, i.e, Real->WMA or Apple->WMA. This was a problem 3 years ago.

The trend is to go DRM free however, and if you have no DRM then;

a) what value is there in a digital file that can be copied? Is the value of the copy $0?

b) how do you prove you have ownership of the mp3? if a copy is free, can I just sell lots of copies, creating an infinite supply and driving the price near to $0

c) would people think a digital file is ‘used’, there is no wear and tear?

I am sure the majors will stop this, they did it for CD’s before on many occasions –