Half Price Books bookstores, eBay and garage sales are good places to sell used CDs. Other resale shops may also buy used CDs from sellers.
Half Price Books buys books, CDs, DVDs, records, magazines, video games and a wide variety of similar products. They appraise items brought in by customers and give an offer for what they are willing to pay for the goods offered. If the offer is accepted, they give cash for the items they purchase, which can include CDs.
The online auction house eBay is a good website for selling old belongings, although it is important to be upfront about the condition and value of the items. It is also better to sell items on eBay that are worth a lot of money, otherwise the shipping costs deter buyers from purchasing cheaper goods.
Many communities allow garage sales, whether they do this at the will of the citizens or they have days set aside to allow for garage sales in their neighborhoods. With the right amount of advertising, or with a community-wide garage-sale event, many potential buyers see the goods people have to offer, meaning that there's an increased chance that the items will be successfully sold to someone.