The "Additional Info" section shows a quick view of how items have sold.

The chart shows a random sampling of what prices selling and unselling items finished at over time with items that sold marked with green, and items that didn't sell marked with red. It is useful for visually seeing at what price items sell for, what prices they don't sell for, and how selling prices has varied over time. Place your mouse over any of the price points to see the item's title.

The "More Information" link will bring you to a page with additional break-downs and analysis of current and past auctions.