An acquaintance of mine once made a living by selling legos online by the piece. He'd buy sets and tear them down, sort them, etc. Apparently this can be profit

An acquaintance of mine once made a living by selling legos online by the piece. He'd buy sets and tear them down, sort them, etc. Apparently this can be profitable especially if you can get a lot of hard to find pieces. This was back in like 2008, so I have no idea if the site exists or if he's still doing it.