copyrights and ownership...and/or transfer of ownership.

[flickmaster]

What are the laws surrounding transfer of ownership pertaining to movies, music etc?

If I have a CD collection and am interested in dumping the ones I never listen to, can I trade them legally with someone else over the net? Even swap?

 

[T-DESIGNER]

I am not an attorney.

If the CDs are not counterfeit/copies/downloads/stolen/etc, why
not?