There are several websites which allow you to sell your music online in CD format. The three most popular options are CDBaby.com, CafePress.com, and CreateSpace.com.
Each website has different costs associated with manufacturing audio CDs. CafePress.com is free to join, and each CD has a base price of $4.99 (paper sleeve) or $8.99 (jewel case with inserts) which is subtracted from the price your customers pay. CDBaby.com has two membership levels for distributing audio CDs: Standard ($49 per album) and Pro ($89 per album). A CDBaby Pro membership is geared towards professional musicians who want to collect royalties on their music. Finally, CreateSpace.com (owned by Amazon) is free to join, and each CD has a base price of $4.95 plus an additional percentage of the list price. This percentage is 15% if you sell it through your own CreateSpace store and 45% if you sell it on the Amazon marketplace.