This is a CD collection of Bach's music. I think it's also suitable for background music at events or in stores. There are no visible stains on the CD itself, but the pamphlet has some age-related discoloration. Please consider this and understand. Includes: "Toccata and Fugue," "Air on the G String," Brandenburg Concertos Nos. 3, 4, and 5. It says "set product" on the inside, but it was mixed with other CDs and sold individually, so I didn't know until I opened it.