I decided I would mosey on down and finally check out the Roll20 marketplace. I'm glad there's content there, both free and premium and here are some thoughts to make looking through it better.
1. More results per page as an option. The less I have to click "next page", the better, to a point.
2. An indicator of how many pages of results you turned up, and which page you're on.
3. Different ways to filter and organize your results, like by price, for instance.
4. Show the price on the search page, without having to click on a result and see its detail page.
Thanks for taking a look here.