Just a FYI, I've been working on a tool that lets you see comic books currently being sold on eBay with filters for digging into the comic age (Gold/Silver/Bronze/Copper and Modern), price and bid activity. Plus I also added in a feature to only see books that were graded versus non graded. I was looking for some creative feedback and of course I would love to share any trends or patterns I have noticed from watching it over the course of the last six months. 
Here is the link.
Here is the link.
