Soundcloud buy link
Add a buy button to your tracks and playlists by clicking the pencil icon below the waveform. In the edit page, go to the Metadata tab and add your Juno artist, label or release page for listeners to purchase your release / releases.
If you are a Pro user, you can also customise the text used for the Buy button on the edit page in the Buy link title section, to read Buy at Juno .More info
YouTube buy link
Add a link to your release at the top of the description section to maximise visibility and sales.