Reddit reviews Metroid Prime with Metroid Prime: Echoes Bonus Disc

Nope. Worth about $5 used on Amazon. I just got one of these the other day. I had never saw one and thought it was a Metroid Prime/Echoes double disc. Was very disappointed that the Echoes disc was just a demo disc (I figured it probably was though) especially after paying $10 for it :/

Just Prime? The specific one I'm looking for is this