I think that is the reality of postage costs today if you are shipping overseas. Unless you are distributed in stores or on something like Amazon, that is the only way you are going to get your CD's out there. And if someone wants one, they will be prepared to pay that postage charge.

I recently ordered a CD from a fellow mudcatter here in the USA. He sent it before I sent the check, so I was able to go ahead and include what I noticed the postage was, which was about $2.00. However, that did not include the price of the CD mailer he had purchased. My advice to him was to charge $4.00 per CD for shipping and handling.

I found this pretty detailed shipping information for USA and overseas for USPO and UPS. Don't know if it will be helpful to you or not.
http://www.swiftcd.com/faq/shipping.html