@Gustavo_Rodrigues you're better off creating a board for each seller, and then creating an overview board where you link to each of their boards from a card.
You could also use something like Unito to synch all lists back to one board, but in order to create an overview on the "parent" card you could aggregate links to those cards into checklists using the API.
Something like this would do it in Trellinator once per hour:
You can read more about Trellinator here:
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