Specialty products like trading cards restock per-shipment, which is why they can vanish for weeks and then reappear all at once
A full quickstart guide is available in the API documentation, and you can get your authentication token after signing up: More Languages on the Way With Korean and Thai now covered, Ximilars Pokmon card identifier supports English, Japanese, Simplified Chinese, Traditional Chinese, Korean, and Thai making it one of the most comprehensive multilingual Pokmon card recognition systems available via API
But long story short, these winners got their own card and helped play with it a bit, making a card that was easily a personal statement as well as cohesive within the game
You have to list each card, monitor prices, and process sales