Pre-release sales vs. launch day sales.
The English version of the Pokemon Trading Card Game Sun & Moon Guardians Rising set was released to the public yesterday (May 5, 2017).
The most sought after card from that set is the Secret Rare 166/145 Double Colorless Energy. I figured it would be interesting to compare May 5, 2017 sales to pre-release sales.
||Average Sale Price**|
|April 23 - May 4, 2017||20||$93.31|
|May 5, 2017||8||$80.16|
The market value for that card dropped approximately 14 percent on launch day, which is just 1 percent off from my 15 percent drop prediction!