Thanks to the advent of audio and video streaming, your CD and DVD collections probably get little use. When you finally decide to toss these outdated formats, visit SecondSpin.com, which will pay you for certain CDs, DVDs, Blu-ray discs, and video games. Create an account on their website, and then enter information about the items you have to sell. After packaging them up and sending them in, you'll receive payment by store credit, check, or a deposit into your PayPal account. Visit SecondSpin.com for more information.