As with any type of "collection," the purchase of music CDs can be considered something of an investment. If a CD stops being produced and becomes rare, its resale value can greatly increase. If you're about to sell some CDs, you want to find out their value so you make sure you're not losing any money from potential sales. You can quickly and easily find out the value of any music CD in your collection using little more than an Internet connection.
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Open your computer's web browser.
Go to Amazon.com, Overstock.com or any other number of online retail vendors that sell music CDs. Type the name of the CD whose value you want to find into the "Search" field and hit "OK." This will take you to the product page for that item. Listed on the product page will be the SRP, or "Suggested Retail Price." This is a price set by the manufacturer and is typically the highest value for a music CD in "new" condition that you will find.
Go to an Internet auction site, like eBay. Type the name of the CD whose value you want to find into the "Search" field and hit "OK." This will take you to a listing of all auctions that are currently going on for that CD. Pay attention to what prices the CD is going for, and how many bidders there are for each auction. An item is only as valuable as someone is willing to pay for it, so just because you see an item listed for $50 it doesn't mean anything if nobody is bidding. Use these results as a good indication of the resale value of the CD.