This is a visualization of prices for over 230,000 US coins scraped from eBay listings. This visualization is intended to naturally tell a story about the mintage timeline of US coins: to inform you on what the most rare and sought out coins are, and to visually narrate a history of our great nation's wealth creation.
Large cent (penny), nickel, dime, quarter, half dollar, and dollar coins each have a timeline of bar graphs per year whose height represent the average price of that coin category.
There are four slider you can use to manipulate and view the data:
The horizontal slider on the bottom allows you to scroll through the timeline.
The Filter slider on the left allows you to filter the data, displaying only years who's average price falls within the specified range. This slider is cubic. Also enter a number in the input boxes below the filter slider followed by pressing enter to set a specific price filter.
The Zoom slider zooms.
Most importantly, clicking on a bar will bring up detailed information of a year. You'll find a distribution of the coin types being sold this year if you click on a coin name.
The red dashed line represents the year the timeline camera is focused on.
The grey dashed lines represent special annotated points of interest. Click a bar on these years!
A note on the data
You will probably find inconsistencies in the data. The biggest problem I ran was I had no easy way to know how many coins an eBay listing was selling. I spent many days trying to get my data correct by reading in title's of eBay listings and hoping I could find how many coins the seller was offering. It is not perfect. Additionally sometimes a year will list coins not from that particular year. This is due to my code and eBay having imperfect categorizations. Ignoring these small inconsistencies, generally the data is fine. But please keep this in mind while browsing this visualization.