Amazon.com has audio clips of "Black Magic Woman" by Santana on the albums listed below. To listen to a clip, click on any album name and you will be taken to a CD product web page with a list of album tracks linked to song clips.
Abraxas [Bonus Tracks] - Santana - SonyThe Amazon.com MP3 Store also has a clip of the above song on the album listed below. Click on the album name and you will be taken to a list of mp3 album tracks with audio samples that include the above song.
Hear It Now! The Sound of the '60s - Various Artists - Sony
The Best of Santana - Santana - Sony
Ultimate Santana - SantanaCDUniverse also has a clip of the above song on the album listed below. Click on the album name and you will be taken to a list of albums, including the one below, that include the above song. (Note: Those albums with music note icons all have song clips. To see the entire list of CDs, you may need to scroll down all the way to the bottom as many songs have lyrics and other information displayed at the top.)
Moonflower - Santana