Looking for a fast way to earn a little extra money by selling your compact disc collection? Amazon.com, Inc. (NASDAQ:AMZN) just extended their trade-in program to include old CDs.

Originally, the Amazon trade-in program offered customers a chance to earn free Amazon gift cards for trading in select electronics such as Apple Inc. (NASDAQ:AAPL) iPads or cell phones, books, and movies. The gift cards are good for any purchase the card is worth. The amount on the card will reflect the worth of your trade-in. Although the program has yet to take affect, you can find out more on their website.

Despite the strong sales of digital media, Amazon has not forgotten about the potential sales of hard copy media- there is still a market for people who want to buy used CDs, DVDs, and books.

Amazon.com is based out of Seattle and it’s one of the largest retail websites. It’s also multinational with separate websites for United States, Canada, Japan, Spain, Germany, France, Italy, and China. When Jeff Bezos first launched the website back in 1994, it was originally an online bookstore. It has since branched out as a virtual mass-retailer that sells everything. Since 1998, the company has aquired Planet All, Internet Movie Database(IMDb), CD Now, Joyo.com, Shopbop, Audible, Zappos, and more. Their subsidiaries include A9.com, Lab126, Endless.com, and Brilliance.

This move should proved to be a good one for Amazon as they give out gift card instead of cash for the trade-ins, which requires the customers to purchase from Amazon.com. Anna Helm from TNW thinks that Amazon’s latest addition to their trade-in program will inspire customers to trade in their old CDs in order to download MP3s.  That’s probably true but most used compact discs aren’t really worth that much anyway and most sellers don’t expect to make a profit of their unwanted merchandise anyway. This new trade-in extension should appeal to tweens and college students who want more music but can’t find a local CD shop to sell their used music to.