Best answer by Gina
The Buy button can be customised meaning that instead of 'Buy' it can say something else like 'Download.' You can then have the link redirect to a third party page that may help you sell your music. If the link you clicked on redirected you to a page that doesn't seem right then I suggest getting in touch with the user of the profile.
We recently launched On SoundCloud which helps users makes money with their profiles however this is not yet released to all users. More info about On SoundCloud here: https://on.soundcloud.com/.