Compare your pokemon tcg collection with the current eBay listings page.
This extension will run on eBay listings pages under the category "Pokemon Cards", it will go through each listing and extract the name and number if it can, which it will then send on to a predefined self-hosted API which hosts your Pokemon TCG Collection (https://www.tcgcollector.com/) in order to check if the card is currently in your collection.
If the card is found, it will replace the listing item's title with Green text, if it's not found it will replace it with Red text, this shows you if you are in need of each card and allow you to complete your collection quickly.