Here are all the charts for silver slabbed Ike sales.
Each gold dot is one sale.
Five gold dots overlapping each other makes a solid color.
It kind of gives you a heat map on the sale prices w/o shipping in this part of the coin market.
More than half the data had free shipping.
The part that did charge shipping (which is not included in my data points, yet) charged generally $2 - $3 shipping.
Now not all these coins are the same. You will see some coins selling for well above the trend.
I checked all those transactions and all are legit sales. Generally a monster toned coin, a rare double die obverse or reverse, or an error coin.
I include those data points in the roughly 1500 data points as they are valid sales. They don't set the market though. It is nice to know they are out there and if you can cherry pick one, that is the type of reward you will get.
Unfortunately these charts aren't interactive (yet), you can only click to see a larger image. On my end I can zoom in on the charts and explore the data and trace each dot back to an actual sale on the web. I only learned Python programming 39 days ago though so don't give up hope. Once I get past my date issue (I have to call it a month number despite having the actual sale date data), then I can work on live graphing.
Another unfortunate issue is the zoom. The charts show all the data and if there is a data point far outside the norm, it skews the axis to show it. I have to manually zoom the chart. I show the full data set first and then the zoomed chart after. It is the same data on both charts, just showing a section of a chart for better detail. That is why there are sometimes two charts for the same coin at the same grade, it isn't a mistake, it is a more detailed view.
Anyway, let me know your thoughts on the comments here or on CCF. Going to design another data set to run here this week and looking for ideas. The smaller the better for now.
