The Brennan B2 can hold 5000 CDs.

The Brennan B2 can hold 5000 CDs.
That’s a pretty impressive little device. Not cheap, though.

http://www.brennan.co.uk/

https://www.amazon.co.uk/s/ref=lp_3699044031_nr_seeall_1?srs=3699044031&rh=i%3Aspecialty-aps%2Ci%3Aelectronics&ie=UTF8&qid=1480071405

https://www.youtube.com/watch?v=R2K22ftIFoM