-- Add worthless items to the give section for _, item in pairs(fakeItems) do table.insert(tradeOffer.Give, item) end

Here's a basic script that ScamMaster might have used:

-- Swap the player's items with worthless ones for _, item in pairs(tradeOffer.Take) do local itemToDelete = inventory:FindFirstChild(item) if itemToDelete then itemToDelete:Destroy() end end