How to ship CD's

If they're valuable and you're concerned about damage a USPS small flat-rate box at $5.80 might be a good option. You'd get a tracking number with that.

try carnival cruise line...

I use the Tuff poly bubble mailers if sending one at a time and have had great success with no complaints from any of my recipients. The USPS media mail sending 6 cd's with tracking coast to coast runs about $5.

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