Plugin for selling music

Can anyone recommend a plugin for selling MP3 music files online, with PayPal handling sales transactions? I tried out a plugin called Music Seller (http://wp.shopfiles.com/?p=312), but it’s not working properly. The project we have is for one artist, so no artwork for each song is needed. Shoppers need to be able to listen to a 30-second sample of any of the songs and should also be able to purchase one or more songs in a single transaction.