Music files and mp3s

I visited the website Amazon Mp3 Store and show that could sort by: Song title; Artist;album;time;price. I wanted some belly dancing music so put belly dancing and search. All the belly dancing CDs show up.You could play samples and if you don't want to buy the cd you can just buy the song you like. I thought that was very cool and now will buy some. There were daily deals and special sales. You can play music anywhere just download from Amazon. It is easy to use. customers would be able to use it unsupervised. At the moment this is only the site which I know that offer free and legal music for download.