Once you have a sizeable Proko library of content, some of the new stuff is hard to locate. Adding a toggle to filter out already purchased items would make it a lot easier to browse for new tools/courses. Visually distinguishing button color or highighlighting css would also be nice. Or maybe add a way to sort by unpurchased by default? Whenever there's a sale, I load all of the courses on the page first and then search for the text "start learning" to locate the new courses.