Bluesky,
Since your concern is storage space, keep the CD's by taking them out of the cases and store them in the below linked Aluminimum hard case that can hold 900 CD's. Take the plastic CD cases to the local library, my library was very appreciative when I brought them in.
http://www.meritline.com/950-discs-rolling-aluminum-cd-holder-cases-wheeled-silver---p-55537.aspx
Since your concern is storage space, keep the CD's by taking them out of the cases and store them in the below linked Aluminimum hard case that can hold 900 CD's. Take the plastic CD cases to the local library, my library was very appreciative when I brought them in.
http://www.meritline.com/950-discs-rolling-aluminum-cd-holder-cases-wheeled-silver---p-55537.aspx