How to ship CD's

I would add cardboard inserts on those hard to replace jewel cases of sacd's, inside padded envelope .

padded envelops. you can also separate cd from jewel case and enclose piece of bubble wrap inside the jewel case

Here's a couple of options to the padded envelope.

http://www.uline.com/BL_1455/Self-Seal-CD-Mailers

http://www.packagingprice.com/forms/product_detail.cfm?categoryID=10173&productID=3001
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"The best packagers also placed a thin square of foam inside the case"

Yes, I love seeing that thin foam inside the case when I receive an expensive classical CD. It protects the center spindle hole.