There's a number of great looking add-ons and sets, but often I'm not 100% ready at the time to purchase them. A shopping cart or similar mechanic would be nice to have. Not only would it be helpful to track interesting products, but it might give insights into what people are interested in but maybe not at the current price. In this way, content providers could maybe give sale prices or reprice things that folks are interested in but not pulling the trigger on.
