Some traders feel that these kind of mailers can contaminate the CD-R's with small particles, especially since the packages seem to easily get statically charged and can rip when opening. Jewel Cases will usually not survive the shipping, and add significantly to the postage costs. So take the required number of discs and place them into either clamshells or Tyvek sleeves. You can get some from American-Digital . Clamshells provide better protection, but are heavier than the sleeves, and thus increase the postage cost.
Most people find that sleeves work fine.
Put an address label on the bubble mailer, to reflect that it will be coming FROM the trader TO you. Be sure to use a return address where this mailer can be delivered to you. Put the discs into the Bubble Mailer. Put this note into the bubble mailer with the CDs. Do NOT seal the Bubble Mailer.