Use an online shopping search engine to compare major retailers and find good prices on new CDs. Use the search to type in the artist name or name of an album or song. Click "Compare" or 'Enter," as necessary, and choose from the results.
Go to a used CD search site to find offerings from many different sellers. Type in the artist name and name of the CD, or browse listings by record label or artist. Try contacting the seller if you can't find what you're after to register it as a "Want."
Use an online music database. Search by artist name or catalog number and find information about your CD. Buy it from a seller who has offered the CD for sale on the site.
Try an online auction site. Look at the completed listings to see how common your CD is. Register your desired CD as wanted on the site to allow sellers to contact you.
Find music retailers online who specialize in the particular genre of your CD, such as rock, pop or dance. Search their listings and email them with the details of your CD to see if they can locate it or give you more information.
Try brick-and-mortar retailers. Ask for your CD in vintage record shops, thrift stores and record fairs. Leave details of what you want and your information so you can be contacted when the CD is available.