What I mean is categories. For example. manufacturer, model for sure. but would you want plastic, weight, condition, bagged or loose.
I would bet that most people put in the plastic, but the rest of that info is not always entered, so you wouldn't get all that valid of data from it. If you do weight, you may want to break it into ranges rather than tallying up each individual weight, especially since the marked weight on discs is notoriously unreliable.