Knowledge: MP3 players can be purchased on eBay as it has lost popularity for companies to make new. On the other hand, music, like Seven and Nature Boy, can be purchased from an application like iTunes from a cell phone.

Conversation:
I love Jazz, I was born in the birthplace of Jazz, New Orleans !
Oh, neat! Many consider jazz to be America's classical music.
I really like Nat King Cole!
So, do you like his song Nature Boy?
I do! But I lost it so I need to buy again to hear. Do you know where I can buy new one?

Response: Yeah, on your cell phone, you can purchase music like Seven and Nature Boy from iTune, an application.